I have an Excitech machine. Bought it with the DSP and converting to Mach3 setup. I've designed my own interface board, but there are plenty that do the job. My rig has a 24VDC supply for the general electrics, so keep that in mind... some interface boards may only want 12V input. You're estop switch may be mains voltage, so take care if you were considering connecting this to an interface board for Mach 3 input. Otherwise it's just re-wiring to your new board. The spindle is probably the only spot that might take you some time to work through if you have a VFD controller.