I have a CNC that I manually zero the z axis. I can usually get it so that I can't tell a height difference between different operations, such as clearing out a v carve with my endmill then switching to my v bit. But sometimes it is noticable. My old CNC had an auto touch plate which made it easy. My question is, how hard is it to wire a touch plate to my machine. I use Mach 3 and I know it is capable of running it, just not sure how hard it would be. Anyone done this before? My machine is the Industrial CNC, 4x8 table. 3hp spindle.