Thanks everyone. I have looked a little for info on how to hook it up to the xylotex board, but honestly havent had much time to do it. If I cant source the one mentioned in Montreal I will get the one from stepperworld along with a few of those shaft couplers, anyone used them?
Was considering just hooking up a switch to the relay on the Z and setting it so when I get to a certain height the motor shuts off or goes on. That way I could have a standard Z height at the end of the run that would shut off the spindle. Much slicker to use the m3 and m5 though.