Hey guys. I appreciate the ideas. I am leaning toward R32 + CNC V3. Thank you Khalid for pointing that out. I missed that addition to the Wiki (my Onstep is running so well that I haven't had to keep up with the latest new stuff). I am sure it will fit in the shadow, although I may have to mount it in line with the OTA axis (on edge, so to speak). And I think it will do everything that I want if I can make the secondary adjustable with only 2 screws. I am thinking 2 screws/steppers will be enough if I drill out one screw hole and install a spring in place of the screw. Then it would work like a common finder scope that has 2 adjustment screws and a spring. The spring will have to be fairly stout to provide enough preload to prevent vibration or shifting. There is quite a lot of leverage created by the cantilevered mirror and its holder.
In answer to some questions. I really do need to fiddle with the secondary. The primary stays rock solid and never needs adjustment. No matter how well I collimate, it is never quite right once I install the camera. I know it sounds a bit crazy. I have 6", 8" and 10" Newts that don't have this problem. It is a curse of the tube design combined the size. I have made numerous modifications to stiffen the tube. But they have not been enough.
I plan to keep the motors de-energized when not adjusting. Otherwise, I suspect that the heat would cause too much turbulence. A fun experiment is to use night vision instead of an eyepiece. Then, with the scope way out of focus on a bright star, hold your hand in front of the OTA. You can clearly see the heat plume coming off your hand.
If I fail to make the 2 screw idea work, I will give the grbl firmware a try. Thank you Alexander for suggesting that. I was wondering which CNC firmware to consider. Gcode and hexapod are new to me. I will have to check them out.
If none of the above works out, I will go old school with switches and DC servo motors. Might even be the best option. Simplicity has its advantages.
Anyways. Thanks again. And if you have further ideas, I am all ears.