I have just had my head in the control box and I can't see anything that may be the drivers for X,Y and Z. It looks like the guy that converted it to mach3 thought the easiest way was to hang an old plastic kitchen chopping board to mount the new BOB on right in front of the original control board.I will just have to wing it and make sure I find the stepper motor leads when I remove the existing circuitry.

After spending last night looking at possible options I am drawn to an AXBB-E Ethernet motion controller and breakout board combined controller as includes a BOB plus it is in stock at https://www.stoneycnc.com/axbb-e-eth...r/a4753?c=3479.

Can you suggest suitable drivers and PSU?