Hi Rob,

didn't take you long :D

You are aware of my kits are in development right? They are made to accept Nema 23 motors with a 2:1 gearing ratio for the exact reason Boyan says.

4Nm would be more than sufficient and to keep the costs down, I would also recommend going with plain steppers. Did use leadshine steppers on my KRV converstion and the cost/benefit was questionable really.

Best spend money on good ballscrews in my opinion.

R's