I am printing with a T Rex 3.0 and the Single Extruder profiles, both Right and Left, have this script in the Start Script tab: T0 M106 P0 S[fan_speed_pwm] M106 P1 S[fan_speed_pwm] G28 ; home all axes M420 S1 G1 X-42 F8000 G92 E0 G1 E5 F500 G1 X0 F5000 G1 X-40 G1 X0 G1 X-40 G1 X0 G1 X-40 G1 X200 G1 ...