diff --git a/PF-build.sh b/PF-build.sh
index 3c0c31ddc..c780900d4 100755
--- a/PF-build.sh
+++ b/PF-build.sh
@@ -2,6 +2,7 @@
 # This bash script is used to compile automatically the Prusa firmware with a dedicated build environment and settings
 # 
 # Supported OS: Windows 10, Linux64 bit
+# Beta OS: Linux32 bit
 #
 # Linux:
 #
@@ -10,9 +11,12 @@
 #
 # Linux Subsystem Ubuntu
 # 1. Follow these instructions
-# 2. Open Ubuntu bash and get latest updates with 'apt-get upgate'
+# 2. Open Ubuntu bash and get latest updates with 'apt-get update'
 # 3. Install zip with 'apt-get install zip'
-# 4. Add at top of ~/.bashrc following lines by using 'sudo nano ~/.bashrc'
+# 4. Install python3 with 'apt-get install python3'
+# 5. Add command 'ln -sf /usr/bin/python3.5 /usr/bin/python' to link python3 to python.
+#    Donnot istall 'python' as python 2.x has end of life see https://pythonclock.org/
+# 6. Add at top of ~/.bashrc following lines by using 'sudo nano ~/.bashrc'
 #
 #    export OS="Linux"
 #    export JAVA_TOOL_OPTIONS="-Djava.net.preferIPv4Stack=true"
@@ -44,11 +48,19 @@
 # gussner@WIN01 MINGW64 /d/Data/Prusa-Firmware
 # FW351-Build1778-1_75mm_MK25-RAMBo13a-E3Dv6full.hex
 #
-# Version: 1.0.1-Build_8
+# Why make Arduino IDE portable?
+# To have a distinguished Prusa Firmware build environment I decided to use Arduino IDE in portable mode.
+# - Changes made to other Arduino instances do not change anything in this build environment.
+#   By default Arduino IDE uses "users" and shared library folders which is useful as soon you update the Software.
+#   But in this case we need a stable and defined build environment, so keep it separated it kind of important.
+#   Some may argue that this is only used by a script, BUT as soon someone accidentally or on purpose starts Arduino IDE
+#   it will use the default Arduino IDE folders and so can corrupt the build environment.
+#
+# Version: 1.0.6-Build_8
 # Change log:
 # 12 Jan 2019, 3d-gussner, Fixed "compiler.c.elf.flags=-w -Os -Wl,-u,vfprintf -lprintf_flt -lm -Wl,--gc-sections" in 'platform.txt'
 # 16 Jan 2019, 3d-gussner, Build_2, Added development check to modify 'Configuration.h' to prevent unwanted LCD messages that Firmware is unknown
-# 17 Jan 2019, 3d-gussner, Build_3, Check for OS Windows or Linux and use the right build enviroment
+# 17 Jan 2019, 3d-gussner, Build_3, Check for OS Windows or Linux and use the right build environment
 # 10 Feb 2019, ropaha, Pull Request, Select variant from list while using build.sh
 # 10 Feb 2019, ropaha, change FW_DEV_VERSION automatically depending on FW_VERSION RC/BETA/ALPHA
 # 10 Feb 2019, 3d-gussner, 1st tests with english only 
@@ -76,108 +88,319 @@
 #                          $2 = multi language OR english only [ALL/EN_ONLY]
 #                          $3 = development status [GOLD/RC/BETA/ALPHA/DEVEL/DEBUG]
 #                          If one argument is wrong a list of valid one will be shown
-# 13 Mar 2019, 3d-gussner, MKbel updated the linux build enviromentto version 1.0.2 with an Fix maximum firmware flash size.
+# 13 Mar 2019, 3d-gussner, MKbel updated the linux build environment to version 1.0.2 with an Fix maximum firmware flash size.
 #                          So did I
+# 11 Jul 2019, deliopoulos,Updated to v1.0.6 as Prusa needs a new board definition for Firmware 3.8.x86_64
+#						   - Splitted the Download of Windows Arduino IDE 1.8.5 and Prusa specific part
+#                            --> less download volume needed and saves some time
+#
+# 13 Jul 2019, deliopoulos,Splitting of Ardunio IDE and Prusa parts also for Linux64
+# 13 Jul 2019, 3d-gussner, Added Linux 32-bit version (untested yet)
+#                          MacOS could be added in future if needs
+# 14 Jul 2019, 3d-gussner, Update preferences and make it really portable
+# 15 Jul 2019, 3d-gussner, New PF-build-env gihub branch
+# 16 Jul 2019, 3d-gussner, New Arduino_boards github fork
+# 17 Jul 2019, 3d-gussner, Final tests under Windows 10 and Linux Subsystem for Windows   
+# 18 Jul 2019, 3d-gussner, Added python check
+# 18 Jul 2019, deliopoulos, No need more for changing 'platform.txt' file as it comes with the Arduino Boards.
+# 18 Jul 2019, deliopoulos, Modified 'PF_BUILD_FILE_URL' to use 'BUILD_ENV' variable
+# 22 Jul 2019, 3d-gussner, Modiffied checks to check folder and/or installation output exists.
+# 22 Jul 2019, 3d-gussner, Added check if Arduino IDE 1.8.5 boards have been updated
+# 22 Jul 2019, 3d-gussner, Changed exit numbers 1-13 for prepare build env 21-28 for prepare compiling 31-36 compiling
+# 22 Jul 2019, 3d-gussner, Changed BOARD_URL to DRracers respository after he pulled my PR https://github.com/DRracer/Arduino_Boards/pull/1
+# 23 Jul 2019, 3d-gussner, Changed Build-env path to "PF-build-dl" as requested in PR https://github.com/prusa3d/Prusa-Firmware/pull/2028
+#                          Changed Hex-files folder to PF-build-hex as requested in PR
+# 23 Jul 2019, 3d-gussner, Added Finding OS version routine so supporting new OS should get easier
 
+#### Start check if OSTYPE is supported
+OS_FOUND=$( command -v uname)
 
-###Check if OSTYPE is supported
-if [ $OSTYPE == "msys" ]; then
+case $( "${OS_FOUND}" | tr '[:upper:]' '[:lower:]') in
+  linux*)
+    TARGET_OS="linux"
+   ;;
+  msys*|cygwin*|mingw*)
+    # or possible 'bash on windows'
+    TARGET_OS='windows'
+   ;;
+  nt|win*)
+    TARGET_OS='windows'
+    ;;
+  *)
+    TARGET_OS='unknown'
+    ;;
+esac
+# Windows
+if [ $TARGET_OS == "windows" ]; then
 	if [ $(uname -m) == "x86_64" ]; then
 		echo "$(tput setaf 2)Windows 64-bit found$(tput sgr0)"
+		Processor="64"
+	elif [ $(uname -m) == "i386" ]; then
+		echo "$(tput setaf 2)Windows 32-bit found$(tput sgr0)"
+		Processor="32"
+	else
+		echo "$(tput setaf 1)Unsupported OS: Windows $(uname -m)"
+		echo "Please refer to the notes of build.sh$(tput sgr0)"
+		exit 1
 	fi
-elif [ $OSTYPE == "linux-gnu" ]; then
+# Linux
+elif [ $TARGET_OS == "linux" ]; then
 	if [ $(uname -m) == "x86_64" ]; then
 		echo "$(tput setaf 2)Linux 64-bit found$(tput sgr0)"
+		Processor="64"
+	elif [[ $(uname -m) == "i386" || $(uname -m) == "i686" ]]; then
+		echo "$(tput setaf 2)Linux 32-bit found$(tput sgr0)"
+		Processor="32"
+	else
+		echo "$(tput setaf 1)Unsupported OS: Linux $(uname -m)"
+		echo "Please refer to the notes of build.sh$(tput sgr0)"
+		exit 1
 	fi
 else
 	echo "$(tput setaf 1)This script doesn't support your Operating system!"
 	echo "Please use Linux 64-bit or Windows 10 64-bit with Linux subsystem / git-bash"
 	echo "Read the notes of build.sh$(tput sgr0)"
-	exit
+	exit 1
 fi
 sleep 2
-###Prepare bash enviroment and check if wget and zip are available
+#### End check if OSTYPE is supported
+
+#### Prepare bash environment and check if wget, zip and other needed things are available
+# Check wget
 if ! type wget > /dev/null; then
 	echo "$(tput setaf 1)Missing 'wget' which is important to run this script"
 	echo "Please follow these instructions https://gist.github.com/evanwill/0207876c3243bbb6863e65ec5dc3f058 to install wget$(tput sgr0)"
-	exit
+	exit 2
 fi
+
+# Check for zip
 if ! type zip > /dev/null; then
-	if [ $OSTYPE == "msys" ]; then
+	if [ $TARGET_OS == "windows" ]; then
 		echo "$(tput setaf 1)Missing 'zip' which is important to run this script"
 		echo "Download and install 7z-zip from its official website https://www.7-zip.org/"
 		echo "By default, it is installed under the directory /c/Program Files/7-Zip in Windows 10 as my case."
 		echo "Run git Bash under Administrator privilege and"
 		echo "navigate to the directory /c/Program Files/Git/mingw64/bin,"
 		echo "you can run the command $(tput setaf 2)ln -s /c/Program Files/7-Zip/7z.exe zip.exe$(tput sgr0)"
-		exit
-	elif [ $OSTYPE == "linux-gnu" ]; then
+		exit 3
+	elif [ $TARGET_OS == "linux" ]; then
 		echo "$(tput setaf 1)Missing 'zip' which is important to run this script"
 		echo "install it with the command $(tput setaf 2)'sudo apt-get install zip'$(tput sgr0)"
-		exit
+		exit 3
+	fi
+fi
+# Check python ... needed during language build
+if ! type python > /dev/null; then
+	if [ $TARGET_OS == "windows" ]; then
+		echo "$(tput setaf 1)Missing 'python' which is important to run this script"
+		exit 4
+	elif [ $TARGET_OS == "linux" ]; then
+		echo "$(tput setaf 1)Missing 'python' which is important to run this script"
+		echo "As Python 2.x will not be maintained from 2020 please,"
+		echo "install it with the command $(tput setaf 2)'sudo apt-get install python3'."
+		echo "Check which version of Python3 has been installed using 'ls /usr/bin/python3*'"
+		echo "Use 'sudo ln -sf /usr/bin/python3.x /usr/bin/python' (where 'x' is your version number) to make it default.$(tput sgr0)"
+		exit 4
 	fi
 fi
-###End prepare bash enviroment
 
-BUILD_ENV="1.0.2"
+#### End prepare bash environment
+
+
+#### Set build environment 
+ARDUINO_ENV="1.8.5"
+BUILD_ENV="1.0.6"
+BOARD="PrusaResearchRambo"
+BOARD_VERSION="1.0.1"
+BOARD_URL="https://raw.githubusercontent.com/DRracer/Arduino_Boards/master/IDE_Board_Manager/package_prusa3d_index.json"
+BOARD_FILENAME="prusa3drambo"
+BOARD_FILE_URL="https://raw.githubusercontent.com/DRracer/Arduino_Boards/master/IDE_Board_Manager/prusa3drambo-1.0.1.tar.bz2"
+PF_BUILD_FILE_URL="https://github.com/3d-gussner/PF-build-env/releases/download/$BUILD_ENV/PF-build-env-$BUILD_ENV.zip"
+LIB="PrusaLibrary"
 SCRIPT_PATH="$( cd "$(dirname "$0")" ; pwd -P )"
 
 # List few useful data
 echo
-echo "Script path:" $SCRIPT_PATH
-echo "OS         :" $OS
-echo "OS type    :" $OSTYPE
+echo "Script path :" $SCRIPT_PATH
+echo "OS          :" $OS
+echo "OS type     :" $TARGET_OS
+echo ""
+echo "Ardunio IDE :" $ARDUINO_ENV
+echo "Build env   :" $BUILD_ENV
+echo "Board       :" $BOARD
+echo "Specific Lib:" $LIB
 echo ""
 
-#### Start prepare building
+#### Start prepare building environment
 
 #Check if build exists and creates it if not
-if [ ! -d "../build-env" ]; then
-    mkdir ../build-env || exit 2
+if [ ! -d "../PF-build-dl" ]; then
+    mkdir ../PF-build-dl || exit 5
 fi
 
-cd ../build-env || exit 3
+cd ../PF-build-dl || exit 6
+BUILD_ENV_PATH="$( cd "$(dirname "$0")" ; pwd -P )"
 
 # Check if PF-build-env-<version> exists and downloads + creates it if not
-# The build enviroment is based on the Arduino IDE 1.8.5 portal version with some changes
+# The build environment is based on the supported Arduino IDE portable version with some changes
 if [ ! -d "../PF-build-env-$BUILD_ENV" ]; then
 	echo "$(tput setaf 6)PF-build-env-$BUILD_ENV is missing ... creating it now for you$(tput sgr 0)"
 	mkdir ../PF-build-env-$BUILD_ENV
 	sleep 5
 fi
 
-if [ $OSTYPE == "msys" ]; then
-	if [ ! -f "PF-build-env-Win-$BUILD_ENV.zip" ]; then
-		echo "$(tput setaf 6)Downloading Windows build environment...$(tput setaf 2)"
+# Download and extract supported Arduino IDE depending on OS
+# Windows
+if [ $TARGET_OS == "windows" ]; then
+	if [ ! -f "arduino-$ARDUINO_ENV-windows.zip" ]; then
+		echo "$(tput setaf 6)Downloading Windows 32/64-bit Arduino IDE portable...$(tput setaf 2)"
 		sleep 2
-		wget https://github.com/3d-gussner/PF-build-env/releases/download/Win-$BUILD_ENV/PF-build-env-Win-$BUILD_ENV.zip || exit 4
-		#cp -f ../../PF-build-env/PF-build-env-Win-$BUILD_ENV.zip PF-build-env-Win-$BUILD_ENV.zip || exit4
+		wget https://downloads.arduino.cc/arduino-$ARDUINO_ENV-windows.zip || exit 7
 		echo "$(tput sgr 0)"
 	fi
-	if [ ! -d "../PF-build-env-$BUILD_ENV/$OSTYPE" ]; then
-		echo "$(tput setaf 6)Unzipping Windows build environment...$(tput setaf 2)"
+	if [ ! -d "../PF-build-env-$BUILD_ENV/$TARGET_OS-$Processor" ]; then
+		echo "$(tput setaf 6)Unzipping Windows 32/64-bit Arduino IDE portable...$(tput setaf 2)"
 		sleep 2
-		unzip PF-build-env-Win-$BUILD_ENV.zip -d ../PF-build-env-$BUILD_ENV/$OSTYPE || exit 4
+		unzip arduino-$ARDUINO_ENV-windows.zip -d ../PF-build-env-$BUILD_ENV || exit 7
+		mv ../PF-build-env-$BUILD_ENV/arduino-$ARDUINO_ENV ../PF-build-env-$BUILD_ENV/$TARGET_OS-$Processor
+		echo "# arduino-$ARDUINO_ENV-$TARGET_OS-$Processor" >> ../PF-build-env-$BUILD_ENV/arduino-$ARDUINO_ENV-$TARGET_OS-$Processor
 		echo "$(tput sgr0)"
 	fi
+fi
+# Linux
+if [ $TARGET_OS == "linux" ]; then
+# 32 or 64 bit version
+	if [ ! -f "arduino-$ARDUINO_ENV-linux$Processor.tar.xz" ]; then
+		echo "$(tput setaf 6)Downloading Linux $Processor Arduino IDE portable...$(tput setaf 2)"
+		sleep 2
+		wget --no-check-certificate https://downloads.arduino.cc/arduino-$ARDUINO_ENV-linux$Processor.tar.xz || exit 8
+		echo "$(tput sgr 0)"
+	fi
+	if [[ ! -d "../PF-build-env-$BUILD_ENV/$TARGET_OS-$Processor" && ! -e "../PF-build-env-$BUILD_ENV/arduino-$ARDUINO_ENV-$TARGET_OS-$Processor.txt" ]]; then
+		echo "$(tput setaf 6)Unzipping Linux $Processor Arduino IDE portable...$(tput setaf 2)"
+		sleep 2
+		tar -xvf arduino-$ARDUINO_ENV-linux$Processor.tar.xz -C ../PF-build-env-$BUILD_ENV/ || exit 8
+		mv ../PF-build-env-$BUILD_ENV/arduino-$ARDUINO_ENV ../PF-build-env-$BUILD_ENV/$TARGET_OS-$Processor
+		echo "# arduino-$ARDUINO_ENV-$TARGET_OS-$Processor" >> ../PF-build-env-$BUILD_ENV/arduino-$ARDUINO_ENV-$TARGET_OS-$Processor.txt
+		echo "$(tput sgr0)"
+	fi
+fi
+# Make Arduino IDE portable
+if [ ! -d ../PF-build-env-$BUILD_ENV/$TARGET_OS-$Processor/ ]; then
+	mkdir ../PF-build-env-$BUILD_ENV/$TARGET_OS-$Processor/
+fi
+
+if [ ! -d ../PF-build-env-$BUILD_ENV/$TARGET_OS-$Processor/portable/ ]; then
+	mkdir ../PF-build-env-$BUILD_ENV/$TARGET_OS-$Processor/portable
+fi
+if [ ! -d ../PF-build-env-$BUILD_ENV/$TARGET_OS-$Processor/portable/output/ ]; then
+	mkdir ../PF-build-env-$BUILD_ENV/$TARGET_OS-$Processor/portable/output
+fi
+if [ ! -d ../PF-build-env-$BUILD_ENV/$TARGET_OS-$Processor/portable/packages/ ]; then
+	mkdir ../PF-build-env-$BUILD_ENV/$TARGET_OS-$Processor/portable/packages
+fi
+if [ ! -d ../PF-build-env-$BUILD_ENV/$TARGET_OS-$Processor/portable/sketchbook/ ]; then
+	mkdir ../PF-build-env-$BUILD_ENV/$TARGET_OS-$Processor/portable/sketchbook
+fi
+if [ ! -d ../PF-build-env-$BUILD_ENV/$TARGET_OS-$Processor/portable/sketchbook/libraries/ ]; then
+	mkdir ../PF-build-env-$BUILD_ENV/$TARGET_OS-$Processor/portable/sketchbook/libraries
+fi
+if [ ! -d ../PF-build-env-$BUILD_ENV/$TARGET_OS-$Processor/portable/staging/ ]; then
+	mkdir ../PF-build-env-$BUILD_ENV/$TARGET_OS-$Processor/portable/staging
+fi
+
+# Change Arduino IDE preferences
+if [ ! -e ../PF-build-env-$BUILD_ENV/Preferences-$TARGET_OS-$Processor.txt ]; then
+	echo "$(tput setaf 6)Setting $TARGET_OS-$Processor Arduino IDE preferences for portable GUI usage...$(tput setaf 2)"
+	sleep 2
+	echo "update.check"
+	sed -i 's/update.check = true/update.check = false/g' ../PF-build-env-$BUILD_ENV/$TARGET_OS-$Processor/lib/preferences.txt
+	echo "board"
+	sed -i 's/board = uno/board = rambo/g' ../PF-build-env-$BUILD_ENV/$TARGET_OS-$Processor/lib/preferences.txt
+	echo "editor.linenumbers"
+	sed -i 's/editor.linenumbers = false/editor.linenumbers = true/g' ../PF-build-env-$BUILD_ENV/$TARGET_OS-$Processor/lib/preferences.txt
+	echo "boardsmanager.additional.urls"
+	echo "boardsmanager.additional.urls=$BOARD_URL" >>../PF-build-env-$BUILD_ENV/$TARGET_OS-$Processor/lib/preferences.txt
+	echo "build.verbose=true" >>../PF-build-env-$BUILD_ENV/$TARGET_OS-$Processor/lib/preferences.txt
+	echo "compiler.cache_core=false" >>../PF-build-env-$BUILD_ENV/$TARGET_OS-$Processor/lib/preferences.txt
+	echo "compiler.warning_level=all" >>../PF-build-env-$BUILD_ENV/$TARGET_OS-$Processor/lib/preferences.txt
+	echo "# Preferences-$TARGET_OS-$Processor" >> ../PF-build-env-$BUILD_ENV/Preferences-$TARGET_OS-$Processor.txt
+	echo "$(tput sgr0)"
+fi
+
+# Download and extract Prusa Firmware related parts
+# Download and extract PrusaResearchRambo board
+if [ ! -f "$BOARD_FILENAME-$BOARD_VERSION.tar.bz2" ]; then
+	echo "$(tput setaf 6)Downloading Prusa Research AVR MK3 RAMBo EINSy build environment...$(tput setaf 2)"
+	sleep 2
+	wget $BOARD_FILE_URL || exit 9
+fi
+if [[ ! -d "../PF-build-env-$BUILD_ENV/$TARGET_OS-$Processor/portable/packages/$BOARD/hardware/avr/$BOARD_VERSION" || ! -e "../PF-build-env-$BUILD_ENV/$BOARD_FILENAME-$BOARD_VERSION-$TARGET_OS-$Processor.txt" ]]; then
+	echo "$(tput setaf 6)Unzipping $BOARD Arduino IDE portable...$(tput setaf 2)"
+	sleep 2
+	tar -xvf $BOARD_FILENAME-$BOARD_VERSION.tar.bz2 -C ../PF-build-env-$BUILD_ENV/ || exit 10
+	if [ ! -d ../PF-build-env-$BUILD_ENV/$TARGET_OS-$Processor/portable/packages/$BOARD ]; then
+		mkdir ../PF-build-env-$BUILD_ENV/$TARGET_OS-$Processor/portable/packages/$BOARD
+	fi
+	if [ ! -d ../PF-build-env-$BUILD_ENV/$TARGET_OS-$Processor/portable/packages/$BOARD ]; then
+		mkdir ../PF-build-env-$BUILD_ENV/$TARGET_OS-$Processor/portable/packages/$BOARD
+	fi
+	if [ ! -d ../PF-build-env-$BUILD_ENV/$TARGET_OS-$Processor/portable/packages/$BOARD/hardware ]; then
+		mkdir ../PF-build-env-$BUILD_ENV/$TARGET_OS-$Processor/portable/packages/$BOARD/hardware
+	fi
+	if [ ! -d ../PF-build-env-$BUILD_ENV/$TARGET_OS-$Processor/portable/packages/$BOARD/hardware/avr ]; then
+		mkdir ../PF-build-env-$BUILD_ENV/$TARGET_OS-$Processor/portable/packages/$BOARD/hardware/avr
+	fi
 	
+	mv ../PF-build-env-$BUILD_ENV/$BOARD_FILENAME-$BOARD_VERSION ../PF-build-env-$BUILD_ENV/$TARGET_OS-$Processor/portable/packages/$BOARD/hardware/avr/$BOARD_VERSION
+	echo "# $BOARD_FILENAME-$BOARD_VERSION" >> ../PF-build-env-$BUILD_ENV/$BOARD_FILENAME-$BOARD_VERSION-$TARGET_OS-$Processor.txt
+	echo "$(tput sgr 0)"
+fi	
+
+# Download and extract Prusa Firmware specific library files
+if [ ! -f "PF-build-env-$BUILD_ENV.zip" ]; then
+	echo "$(tput setaf 6)Downloading Prusa Firmware build environment...$(tput setaf 2)"
+	sleep 2
+	wget $PF_BUILD_FILE_URL || exit 11
+	echo "$(tput sgr 0)"
+fi
+if [ ! -e "../PF-build-env-$BUILD_ENV/PF-build-env-$BUILD_ENV-$TARGET_OS-$Processor.txt" ]; then
+	echo "$(tput setaf 6)Unzipping Prusa Firmware build environment...$(tput setaf 2)"
+	sleep 2
+	unzip -o PF-build-env-$BUILD_ENV.zip -d ../PF-build-env-$BUILD_ENV/$TARGET_OS-$Processor || exit 12
+	echo "# PF-build-env-$TARGET_OS-$Processor-$BUILD_ENV" >> ../PF-build-env-$BUILD_ENV/PF-build-env-$BUILD_ENV-$TARGET_OS-$Processor.txt
+	echo "$(tput sgr0)"
 fi
 
-if [ $OSTYPE == "linux-gnu" ]; then
-	if [ ! -f "PF-build-env-Linux64-$BUILD_ENV.zip" ]; then
-		echo "$(tput setaf 6)Downloading Linux 64 build environment...$(tput setaf 2)"
-		sleep 2
-		wget https://github.com/mkbel/PF-build-env/releases/download/$BUILD_ENV/PF-build-env-Linux64-$BUILD_ENV.zip || exit 3
-		echo "$(tput sgr0)"
-	fi
-
-	if [ ! -d "../PF-build-env-$BUILD_ENV/$OSTYPE" ]; then
-		echo "$(tput setaf 6)Unzipping Linux build enviroment...$(tput setaf 2)"
-		sleep 2
-		unzip PF-build-env-Linux64-$BUILD_ENV.zip -d ../PF-build-env-$BUILD_ENV/$OSTYPE || exit 4
-		echo "$(tput sgr0)"
-	fi
+# Check if User updated Arduino IDE 1.8.5 boardsmanager and tools
+if [ -d "../PF-build-env-$BUILD_ENV/$TARGET_OS-$Processor/portable/packages/arduino/tools" ]; then
+	echo "$(tput setaf 6)Arduino IDE boards / tools have been manually updated...$"
+	echo "Please don't update the 'Arduino AVR boards' as this will prevent running this script (tput setaf 2)"
+	sleep 2
+fi	
+if [ -d "../PF-build-env-$BUILD_ENV/$TARGET_OS-$Processor/portable/packages/arduino/tools/avr-gcc/4.9.2-atmel3.5.4-arduino2" ]; then
+	echo "$(tput setaf 6)PrusaReasearch compatible tools have been manually updated...$(tput setaf 2)"
+	sleep 2
+	echo "$(tput setaf 6)Copying Prusa Firmware build environment to manually updated boards / tools...$(tput setaf 2)"
+	sleep 2
+	cp -f ../PF-build-env-$BUILD_ENV/$TARGET_OS-$Processor/hardware/tools/avr/avr/lib/ldscripts/avr6.xn ../PF-build-env-$BUILD_ENV/$TARGET_OS-$Processor/portable/packages/arduino/tools/avr-gcc/4.9.2-atmel3.5.4-arduino2/avr/lib/ldscripts/avr6.xn
+	echo "# PF-build-env-portable-$TARGET_OS-$Processor-$BUILD_ENV" >> ../PF-build-env-$BUILD_ENV/PF-build-env-portable-$BUILD_ENV-$TARGET_OS-$Processor.txt
+	echo "$(tput sgr0)"
+fi	
+if [ -d "../PF-build-env-$BUILD_ENV/$TARGET_OS-$Processor/portable/packages/arduino/tools/avr-gcc/5.4.0-atmel3.6.1-arduino2" ]; then
+	echo "$(tput setaf 1)Arduino IDE tools have been updated manually to a non supported version!!!"
+	echo "Delete ../PF-build-env-$BUILD_ENV and start the script again"
+	echo "Script will not continue until this have been fixed $(tput setaf 2)"
+	sleep 2
+	echo "$(tput sgr0)"
+	exit 13
 fi
+
+
+#### End prepare building
+
+
+#### Start 
 cd $SCRIPT_PATH
 
 # First argument defines which variant of the Prusa Firmware will be compiled 
@@ -201,7 +424,7 @@ if [ -z "$1" ] ; then
 				;;
 			"Quit")
 				echo "You chose to stop"
-					exit 1
+					exit
 					;;
 			*)
 				echo "$(tput setaf 1)This is not a valid variant$(tput sgr0)"
@@ -215,7 +438,7 @@ else
 		echo "$(tput setaf 1)$1 could not be found in Firmware/variants please choose a valid one$(tput setaf 2)"
 		ls -1 $SCRIPT_PATH/Firmware/variants/*.h | xargs -n1 basename
 		echo "$(tput sgr0)"
-		exit
+		exit 21
 	fi
 fi
 
@@ -250,7 +473,7 @@ else
 	else
 		echo "$(tput setaf 1)Language argument is wrong!$(tput sgr0)"
 		echo "Only $(tput setaf 2)'ALL'$(tput sgr0) or $(tput setaf 2)'EN_ONLY'$(tput sgr0) are allowed as 2nd argument!"
-		exit
+		exit 22
 	fi
 fi
 #Check if DEV_STATUS is selected via argument 3
@@ -260,23 +483,23 @@ if [ ! -z "$3" ] ; then
 	else
 		echo "$(tput setaf 1)Development argument is wrong!$(tput sgr0)"
 		echo "Only $(tput setaf 2)'GOLD', 'RC', 'BETA', 'ALPHA', 'DEVEL' or 'DEBUG'$(tput sgr0) are allowed as 3rd argument!$(tput sgr0)"
-		exit
+		exit 23
 	fi
 fi
 
 #Set BUILD_ENV_PATH
-cd ../PF-build-env-$BUILD_ENV/$OSTYPE || exit 5
+cd ../PF-build-env-$BUILD_ENV/$TARGET_OS-$Processor || exit 24
 BUILD_ENV_PATH="$( pwd -P )"
 
 cd ../..
 
 #Checkif BUILD_PATH exists and if not creates it
 if [ ! -d "Prusa-Firmware-build" ]; then
-    mkdir Prusa-Firmware-build  || exit 6
+    mkdir Prusa-Firmware-build  || exit 25
 fi
 
 #Set the BUILD_PATH for Arduino IDE
-cd Prusa-Firmware-build || exit 7
+cd Prusa-Firmware-build || exit 26
 BUILD_PATH="$( pwd -P )"
 
 for v in ${VARIANTS[*]}
@@ -328,10 +551,10 @@ do
 		DEV_STATUS=$DEV_STATUS_SELECTED
 	fi
 	#Prepare hex files folders
-	if [ ! -d "$SCRIPT_PATH/../Hex-files/FW$FW-Build$BUILD/$MOTHERBOARD" ]; then
-		mkdir -p $SCRIPT_PATH/../Hex-files/FW$FW-Build$BUILD/$MOTHERBOARD || exit 10
+	if [ ! -d "$SCRIPT_PATH/../PF-build-hex/FW$FW-Build$BUILD/$MOTHERBOARD" ]; then
+		mkdir -p $SCRIPT_PATH/../PF-build-hex/FW$FW-Build$BUILD/$MOTHERBOARD || exit 27
 	fi
-	OUTPUT_FOLDER="Hex-files/FW$FW-Build$BUILD/$MOTHERBOARD"
+	OUTPUT_FOLDER="PF-build-hex/FW$FW-Build$BUILD/$MOTHERBOARD"
 	
 	#Check if exactly the same hexfile already exists
 	if [[ -f "$SCRIPT_PATH/../$OUTPUT_FOLDER/FW$FW-Build$BUILD-$VARIANT.hex"  &&  "$LANGUAGES" == "ALL" ]]; then
@@ -366,11 +589,11 @@ do
 
 	#Prepare Firmware to be compiled by copying variant as Configuration_prusa.h
 	if [ ! -f "$SCRIPT_PATH/Firmware/Configuration_prusa.h" ]; then
-		cp -f $SCRIPT_PATH/Firmware/variants/$VARIANT.h $SCRIPT_PATH/Firmware/Configuration_prusa.h || exit 11
+		cp -f $SCRIPT_PATH/Firmware/variants/$VARIANT.h $SCRIPT_PATH/Firmware/Configuration_prusa.h || exit 28
 	else
 		echo "$(tput setaf 6)Configuration_prusa.h already exist it will be overwritten in 10 seconds by the chosen variant.$(tput sgr 0)"
 		read -t 10 -p "Press Enter to continue..."
-		cp -f $SCRIPT_PATH/Firmware/variants/$VARIANT.h $SCRIPT_PATH/Firmware/Configuration_prusa.h || exit 11
+		cp -f $SCRIPT_PATH/Firmware/variants/$VARIANT.h $SCRIPT_PATH/Firmware/Configuration_prusa.h || exit 28
 	fi
 
 	#Prepare Configuration.h to use the correct FW_DEV_VERSION to prevent LCD messages when connecting with OctoPrint
@@ -391,22 +614,9 @@ do
 	fi
 		
 	#Check if compiler flags are set to Prusa specific needs for the rambo board.
-	if [ $OSTYPE == "msys" ]; then
-		RAMBO_PLATFORM_FILE="rambo/hardware/avr/1.0.1/platform.txt"
-		COMP_FLAGS="compiler.c.elf.flags={compiler.warning_flags} -Os -g -flto -fuse-linker-plugin -Wl,-u,vfprintf -lprintf_flt -lm -Wl,--gc-sections"
-		CHECK_FLAGS=$(grep --max-count=1 "$COMP_FLAGS" $BUILD_ENV_PATH/portable/packages/$RAMBO_PLATFORM_FILE)
-		if [ -z "$CHECK_FLAGS" ]; then
-			echo "Compiler flags not found, adding flags"
-			if [ ! -f $BUILD_ENV_PATH/portable/packages/$RAMBO_PLATFORM_FILE.bck ]; then
-				echo "making a backup"
-				ls -1 $BUILD_ENV_PATH/portable/packages/rambo/hardware/avr/1.0.1/
-				cp -f $BUILD_ENV_PATH/portable/packages/$RAMBO_PLATFORM_FILE $BUILD_ENV_PATH/portable/packages/$RAMBO_PLATFORM_FILE.bck
-			fi
-			echo $COMP_FLAGS >> $BUILD_ENV_PATH/portable/packages/$RAMBO_PLATFORM_FILE
-		else
-			echo "Compiler flags are set in rambo platform.txt" $CHECK_FLAGS
-		fi
-	fi	
+#	if [ $TARGET_OS == "windows" ]; then
+#		RAMBO_PLATFORM_FILE="PrusaResearchRambo/avr/platform.txt"
+#	fi	
 	
 	#### End of Prepare building
 		
@@ -414,37 +624,28 @@ do
 		
 	export ARDUINO=$BUILD_ENV_PATH
 	#echo $BUILD_ENV_PATH
-	export BUILDER=$ARDUINO/arduino-builder
+	#export BUILDER=$ARDUINO/arduino-builder
 
 	echo
 	#read -t 5 -p "Press Enter..."
 	echo 
 
-	if [ $OSTYPE == "msys" ]; then
-		echo "Start to build Prusa Firmware under Windows..."
-		echo "Using variant $VARIANT$(tput setaf 3)"
-		sleep 2
-		#$BUILDER -dump-prefs -logger=machine -hardware $ARDUINO/hardware -hardware $ARDUINO/portable/packages -tools $ARDUINO/tools-builder -tools $ARDUINO/hardware/tools/avr -tools $ARDUINO/portable/packages -built-in-libraries $ARDUINO/libraries -libraries $ARDUINO/portable/sketchbook/libraries -fqbn=rambo:avr:rambo -ide-version=10805 -build-path=$BUILD_PATH -warnings=none -quiet $SCRIPT_PATH/Firmware/Firmware.ino || exit 12
-		#$BUILDER -compile -logger=machine -hardware $ARDUINO/hardware -hardware $ARDUINO/portable/packages -tools $ARDUINO/tools-builder -tools $ARDUINO/hardware/tools/avr -tools $ARDUINO/portable/packages -built-in-libraries $ARDUINO/libraries -libraries $ARDUINO/portable/sketchbook/libraries -fqbn=rambo:avr:rambo -ide-version=10805 -build-path=$BUILD_PATH -warnings=none -quiet $SCRIPT_PATH/Firmware/Firmware.ino || exit 13
-		$BUILDER -compile -hardware $ARDUINO/hardware -hardware $ARDUINO/portable/packages -tools $ARDUINO/tools-builder -tools $ARDUINO/hardware/tools/avr -tools $ARDUINO/portable/packages -built-in-libraries $ARDUINO/libraries -libraries $ARDUINO/portable/sketchbook/libraries -fqbn=rambo:avr:rambo -ide-version=10805 -build-path=$BUILD_PATH -warnings=all $SCRIPT_PATH/Firmware/Firmware.ino || exit 14
-		echo "$(tput sgr 0)"
-	fi
-	if [ $OSTYPE == "linux-gnu" ] ; then
-		echo "Start to build Prusa Firmware under Linux 64..."
-		echo "Using variant $VARIANT$(tput setaf 3)"
-		sleep 2
-		$BUILD_ENV_PATH/arduino $SCRIPT_PATH/Firmware/Firmware.ino --verify --board rambo:avr:rambo --pref build.path=$BUILD_PATH --pref compiler.warning_level=all || exit 14
-		echo "$(tput sgr 0)"
-	fi
+	echo "Start to build Prusa Firmware ..."
+	echo "Using variant $VARIANT$(tput setaf 3)"
+	sleep 2
+	#$BUILD_ENV_PATH/arduino-builder -dump-prefs -debug-level 10 -compile -hardware $ARDUINO/hardware -hardware $ARDUINO/portable/packages -tools $ARDUINO/tools-builder -tools $ARDUINO/hardware/tools/avr -tools $ARDUINO/portable/packages -built-in-libraries $ARDUINO/libraries -libraries $ARDUINO/portable/sketchbook/libraries -fqbn=$BOARD:avr:rambo -ide-version=10805 -build-path=$BUILD_PATH -warnings=all $SCRIPT_PATH/Firmware/Firmware.ino || exit 14
+	$BUILD_ENV_PATH/arduino-builder -compile -hardware $ARDUINO/hardware -hardware $ARDUINO/portable/packages -tools $ARDUINO/tools-builder -tools $ARDUINO/hardware/tools/avr -tools $ARDUINO/portable/packages -built-in-libraries $ARDUINO/libraries -libraries $ARDUINO/portable/sketchbook/libraries -fqbn=$BOARD:avr:rambo -ide-version=10805 -build-path=$BUILD_PATH -warnings=all $SCRIPT_PATH/Firmware/Firmware.ino || exit 14
+	echo "$(tput sgr 0)"
 
 	if [ $LANGUAGES ==  "ALL" ]; then
 		echo "$(tput setaf 2)"
+
 		echo "Building multi language firmware" $MULTI_LANGUAGE_CHECK
 		echo "$(tput sgr 0)"
 		sleep 2
 		cd $SCRIPT_PATH/lang
 		echo "$(tput setaf 3)"
-		./config.sh || exit 15
+		./config.sh || exit 31
 		echo "$(tput sgr 0)"
 		# Check if previous languages and firmware build exist and if so clean them up
 		if [ -f "lang_en.tmp" ]; then
@@ -465,43 +666,43 @@ do
 		fi
 		# build languages
 		echo "$(tput setaf 3)"
-		./lang-build.sh || exit 16
+		./lang-build.sh || exit 32
 		# Combine compiled firmware with languages 
-		./fw-build.sh || exit 17
+		./fw-build.sh || exit 33
 		echo "$(tput sgr 0)"
 		# Check if the motherboard is an EINSY and if so only one hex file will generated
 		MOTHERBOARD=$(grep --max-count=1 "\bMOTHERBOARD\b" $SCRIPT_PATH/Firmware/variants/$VARIANT.h | sed -e's/  */ /g' |cut -d ' ' -f3)
 		# If the motherboard is an EINSY just copy one hexfile
 		if [ "$MOTHERBOARD" = "BOARD_EINSY_1_0a" ]; then
-			echo "$(tput setaf 2)Copying multi language firmware for MK3/Einsy board to Hex-files folder$(tput sgr 0)"
+			echo "$(tput setaf 2)Copying multi language firmware for MK3/Einsy board to PF-build-hex folder$(tput sgr 0)"
 			cp -f firmware.hex $SCRIPT_PATH/../$OUTPUT_FOLDER/FW$FW-Build$BUILD-$VARIANT.hex
 		else
-			echo "$(tput setaf 2)Zip multi language firmware for MK2.5/miniRAMbo board to Hex-files folder$(tput sgr 0)"
+			echo "$(tput setaf 2)Zip multi language firmware for MK2.5/miniRAMbo board to PF-build-hex folder$(tput sgr 0)"
 			cp -f firmware_cz.hex $SCRIPT_PATH/../$OUTPUT_FOLDER/FW$FW-Build$BUILD-$VARIANT-cz.hex
 			cp -f firmware_de.hex $SCRIPT_PATH/../$OUTPUT_FOLDER/FW$FW-Build$BUILD-$VARIANT-de.hex
 			cp -f firmware_es.hex $SCRIPT_PATH/../$OUTPUT_FOLDER/FW$FW-Build$BUILD-$VARIANT-es.hex
 			cp -f firmware_fr.hex $SCRIPT_PATH/../$OUTPUT_FOLDER/FW$FW-Build$BUILD-$VARIANT-fr.hex
 			cp -f firmware_it.hex $SCRIPT_PATH/../$OUTPUT_FOLDER/FW$FW-Build$BUILD-$VARIANT-it.hex
 			cp -f firmware_pl.hex $SCRIPT_PATH/../$OUTPUT_FOLDER/FW$FW-Build$BUILD-$VARIANT-pl.hex
-			if [ $OSTYPE == "msys" ]; then 
+			if [ $TARGET_OS == "windows" ]; then 
 				zip a $SCRIPT_PATH/../$OUTPUT_FOLDER/FW$FW-Build$BUILD-$VARIANT.zip $SCRIPT_PATH/../$OUTPUT_FOLDER/FW$FW-Build$BUILD-$VARIANT-??.hex
 				rm $SCRIPT_PATH/../$OUTPUT_FOLDER/FW$FW-Build$BUILD-$VARIANT-??.hex
-			elif [ $OSTYPE == "linux-gnu" ]; then
+			elif [ $TARGET_OS == "linux" ]; then
 				zip -m -j ../../$OUTPUT_FOLDER/FW$FW-Build$BUILD-$VARIANT.zip ../../$OUTPUT_FOLDER/FW$FW-Build$BUILD-$VARIANT-??.hex
 			fi
 		fi
 		# Cleanup after build
 		echo "$(tput setaf 3)"
-		./fw-clean.sh || exit 18
-		./lang-clean.sh || exit 19
+		./fw-clean.sh || exit 34
+		./lang-clean.sh || exit 35
 		echo "$(tput sgr 0)"
 	else
-		echo "$(tput setaf 2)Copying English only firmware to Hex-files folder$(tput sgr 0)"
-		cp -f $BUILD_PATH/Firmware.ino.hex $SCRIPT_PATH/../$OUTPUT_FOLDER/FW$FW-Build$BUILD-$VARIANT-EN_ONLY.hex || exit 20
+		echo "$(tput setaf 2)Copying English only firmware to PF-build-hex folder$(tput sgr 0)"
+		cp -f $BUILD_PATH/Firmware.ino.hex $SCRIPT_PATH/../$OUTPUT_FOLDER/FW$FW-Build$BUILD-$VARIANT-EN_ONLY.hex || exit 34
 	fi
 
 	# Cleanup Firmware
-	rm $SCRIPT_PATH/Firmware/Configuration_prusa.h || exit 17
+	rm $SCRIPT_PATH/Firmware/Configuration_prusa.h || exit 36
 	sed -i -- "s/^#define FW_DEV_VERSION FW_VERSION_$DEV_STATUS/#define FW_DEV_VERSION FW_VERSION_UNKNOWN/g" $SCRIPT_PATH/Firmware/Configuration.h
 	sed -i -- 's/^#define FW_REPOSITORY "Prusa3d"/#define FW_REPOSITORY "Unknown"/g' $SCRIPT_PATH/Firmware/Configuration.h
 	echo $MULTI_LANGUAGE_CHECK
@@ -511,14 +712,6 @@ do
 	sleep 5
 done
 
-# Cleanup compiler flags are set to Prusa specific needs for the rambo board.
-#if [ $OSTYPE == "msys" ]; then
-#	echo " "
-#	echo "Restore Windows platform.txt"
-#	echo " "
-#	cp -f $BUILD_ENV_PATH/portable/packages/$RAMBO_PLATFORM_FILE.bck $BUILD_ENV_PATH/portable/packages/$RAMBO_PLATFORM_FILE
-#fi
-
 # Switch to hex path and list build files
 cd $SCRIPT_PATH
 cd ..