Haven't as of this time but looking at Probotix's and RS's system though Probotix's has some pluses over the RS system. Unfortunately what i would like to put on the system is outside the current budget (MUST get contract closed). Once the contract on the instruments is closed and a few other items dealt with I might upgrade again (will see how their system runs). I will be upgrading to true 190 oz-in motors (probably from MotionControl) and will be sticking with unipolar wiring on the motors for a bit.

Will let you know what the final result and choices.

Michael