[brucesu1]

Thanks Jim
I was aware of the german revolver but would like to make it with fewer parts to simplify machining and other work. I feel that once it locks down on even just 2 dowel pins in line with the tool it is not going to go anywhere. My plan is to have the cylinder end with play in the coupling so that the air cylinder disc will not rotate when the stepper is energized but with enough stroke to unlock the turret from the dowel pins.
Bruce