Mitch and Jolie--
I trained in my electric-gear C model, with a functioning PC system. A couple of times my CFII allowed me to use the Brittain heading bug, until she figured out it was controlling the direction of flight and not just a colored pointer on the DG. After that, I hand-flew everything in training, but never disabled the PC. I don't like pulling the button out of the yoke, and don't carry rubber bands, empty film cans, etc.
DO keep some binder clips for holding the approach plates open, but keep them off the yoke. Neither CFII or DE complained that the plane trimmed up and flew straight and level . . . as long as I had the Accu-Trak and Accu-Flight turned off. The DE didn't ask me to demonstrate them coupled to the 430 for an approach, either, since he said it's "not a real auto pilot." [No altitude hold, no "approach" mode, no climb/descent rates, etc.] FYI, my checkride was last April.
As an aside, I usually ignore the yoke button anyway. I don't make a whole lot of turns in cruise, and they're generally pretty shallow, often just a tweak of the heading bug. Around the VFR pattern, the resistance keeps me from overbanking, and since I'm used to flying that way, it's not much of a problem in holds, procedure turns, etc. Override is easy and natural, relax pressure and we level off, and I don't have to move my thumb. Can't press the override button and the push-to-talk at the same time, anyway . . .