diff --git a/extruder/Makefile b/extruder/Makefile
index 56ddf6a..dd18c29 100644
--- a/extruder/Makefile
+++ b/extruder/Makefile
@@ -65,6 +65,8 @@ OBJCOPY = $(ARCH)objcopy
 #   enables reprap-style acceleration                                        #
 # ACCELERATION_RAMPING                                                       #
 #   enables start/stop ramping                                               #
+# GEN3                                                                       #
+#   build for standard reprap electronics instead of your custom rig         #
 #                                                                            #
 ##############################################################################
 
@@ -109,9 +111,9 @@ clean:
 
 size: $(PROGRAM).elf
 	@echo "  SIZE                   Atmega168        Atmega328p       Atmega644"
-	@$(OBJDUMP) -h $^ | perl -ne '/.(text)\s+([0-9a-f]+)/ && do { $$a += eval "0x$$2" }; END { printf "    FLASH : %5d bytes  (%2d%% of %2dkb)    (%2d%% of %2dkb)    (%2d%% of %2dkb)\n", $$a, $$a * 100 / (14 * 1024), 14, $$a * 100 / (30 * 1024), 30, $$a * 100 / (63 * 1024), 63 }'
-	@$(OBJDUMP) -h $^ | perl -ne '/.(data|bss)\s+([0-9a-f]+)/ && do { $$a += eval "0x$$2" }; END { printf "    RAM   : %5d bytes  (%2d%% of %2dkb)    (%2d%% of %2dkb)    (%2d%% of %2dkb)\n", $$a, $$a * 100 / (1 * 1024), 1, $$a * 100 / (2 * 1024), 2, $$a * 100 / (4 * 1024), 4 }'
-	@$(OBJDUMP) -h $^ | perl -ne '/.(eeprom)\s+([0-9a-f]+)/ && do { $$a += eval "0x$$2" }; END { printf "    EEPROM: %5d bytes  (%2d%% of %2dkb)    (%2d%% of %2dkb)    (%2d%% of %2dkb)\n", $$a, $$a * 100 / (1 * 1024), 1, $$a * 100 / (2 * 1024), 2, $$a * 100 / (2 * 1024), 2 }'
+	@$(OBJDUMP) -h $^ | perl -MPOSIX -ne '/.(text)\s+([0-9a-f]+)/ && do { $$a += eval "0x$$2" }; END { printf "    FLASH : %5d bytes  (%2d%% of %2dkb)    (%2d%% of %2dkb)    (%2d%% of %2dkb)\n", $$a, ceil($$a * 100 / (14 * 1024)), 14, ceil($$a * 100 / (30 * 1024)), 30, ceil($$a * 100 / (63 * 1024)), 63 }'
+	@$(OBJDUMP) -h $^ | perl -MPOSIX -ne '/.(data|bss)\s+([0-9a-f]+)/ && do { $$a += eval "0x$$2" }; END { printf "    RAM   : %5d bytes  (%2d%% of %2dkb)    (%2d%% of %2dkb)    (%2d%% of %2dkb)\n", $$a, ceil($$a * 100 / (1 * 1024)), 1, ceil($$a * 100 / (2 * 1024)), 2, ceil($$a * 100 / (4 * 1024)), 4 }'
+	@$(OBJDUMP) -h $^ | perl -MPOSIX -ne '/.(eeprom)\s+([0-9a-f]+)/ && do { $$a += eval "0x$$2" }; END { printf "    EEPROM: %5d bytes  (%2d%% of %2dkb)    (%2d%% of %2dkb)    (%2d%% of %2dkb)\n", $$a, ceil($$a * 100 / (1 * 1024)), 1, ceil($$a * 100 / (2 * 1024)), 2, ceil($$a * 100 / (2 * 1024)), 2 }'
 
 config.h: config.h.dist
 	@echo "Please review config.h, as config.h.dist is more recent."