I know what it is to chase electrical problems. Whaen I completed my restoration the turn signal switch shorted and took out the wiring harness from the steering column to the fuse box! Thank God my trade experience is electrical. I built a new harness and replaced after about 80 hrs of work. I have had both problems that you discussed with regulators, generators and starter. I have a great Napa store in town but they are clueless when it comes to parts for the 912. Classic & Speed Performance in Arcadia is an excellent source if you can't find parts. I get the comment all the time from parts jockeys, "it's the same as as VW". That's when I run......... Also the 912 Registry has saved my butt with this car. I wish that they were around when I had problems in the 70's & 80's. Feel free to email me directly if you have problems because I've had them all with my '68.