I have had a look inside the post code for the mach plasma with THC option in sheetcam and it has the code for G31 seeking so it just needs some options altering and the floating head switch wired to the probe input I think.

basically all I want is to have the torch seek the metal at the start of each cut then raise to pierce height and start.

i also want to retain the top limit switch for the "home all" feature in mach.