(run this with STEPS_PER_M_X < 500000)
(for example, the typical 80000)
G21
G90
G1 X5 F400
G1 X0
G1 F200
G1 X10
G1 F400
G1 X20
G1 X20.001
G1 X20.002
G1 X20.003
G1 X25
G1 X0
M2