Ah thanks - will it ever likely be implemented?
I've included the following lines in my config file.
M950 P0 C"e0heat" ; Allocated GPOP Port 0 to Heater 1
M453 C"e1heat" Q300 R24000 ; Set to CNC mode, using Tool 1, 24000 Max RPM
and have updated my post processor in V-carve to include M42 P0 S1 next to the M3 S# command and M42 P0 S0 next to M5. So I can still use my machine.
But is there a way of switching additional pins alongside the one assigned to the M3/M5 command without editing the post processor? I'd like to control LED lights when g-code commands are executed, as a kind of safety traffic light system. Red for M3. Yellow for G1 G0 G2 G3 movements.