Change!!! Getter!!
Ok,
I decided to proceed, and today I did the battery change on 4 CPS3, 2 of them with the infamous black wire.
Thanks to Razoola for the guide and MKL for his posts about the possible ground spot for the second "black wire".
So I tried this "hybrid" mode (and btw this was my first attempt ever!)
A note: as I asked about the running-game method, I must admit that I finally choose to proceed with the helper battery one just for one reason: I don't think it's easy to work around the cart while mounted, IMHO.
Here some pic of the journey, maybe this will help people as the spirit of the thread, - hope I'm not hijacking anything :P
Probably the worst part, unscrew the bolt without the proper tool!
Here the helper battery, I soldered extension cables and protected the joint/copper connectors with thermo-sheath (nice trick!)
The second "black wire", following the ground spots advised by MKL:
Here a detail of the common ground for both battery&black wire n.2:
JoJo and 3dStrike were easier indeeds:
After some CPS2 swap too, here the result of the day:
not without some surprise, still functional of course!
Thanks again as for at least 6 years I will not worry about my precious CPS3s!!!
(^_^)