For those who are into electrics/electronics, and can make out the Dutch language, there is a quite interesting article on another forum:
https://www.circuitsonline.net/forum/view/135679 discussing the original (Ducati) rectifier/regulator, including schematics. Also giving an in-depth test and discussion of an after-market alternative from Silent Hektik. I am now trying to convince that chap to run the same tests on another alternative, the one I use, which is from one Mr. Schicke, also German.