I have the somewhat older AVID CNC (CNC ROUTER PARTS), I'm assuming 2-3 years old maybe, that I bought last year from someone on craigslist. Its got the plug and play electronics with the NEMA 34 motors. Everything works on the machine with MACH4 so far with no issues except zeroing the work piece. I ordered the z zero touch plate from avid cnc and sometimes the machine will go through the auto zero cycle and sometimes I have to hit the e stop because its plunging down into the plate and not stopping. However, when it does work and finishes the cycle, when I press "Go to Work X/Y" the machine moves but it's bout 3/8" off in the X and Y from being at true zero......not sure what's going on. If anyone could help what would be amazing.