yet another question - How do you pick the resolution to use (microsteps) for carving wood? Example: I have 2 DM542s and one DM860. DM542 range from 2 to 128 Microsteps and 400 to 25600 Step/rev.(for 1.8* motor). DM860 2 to 256 Microsteps and 400 to 25600 Step/rev.(for 1.8* motor).