A little "off topic" question for you great electrical guys ???

When GM first startered using those electronic regulators They added diodes in a crowd of places to protect the regulator from voltage spikes at switch off. Most obviuos was the one on the harness plug to a/c clutch. I've oftem wondered how they hold up when aftermarket electricals like cooling fans, etc.., are added to the system. It helps to have the battery ground directly the altenater or as close as possible (current takes the path of least resistance).
If you'll buy a quality regulater ( NAPA I guess ) and take one of the failed altenaters to the workbench you will find its a pretty simple task (30 minutes) to R&R the regulator rather than replace the entire unit.

I dont recall seeing an adjustment screw on a solid state regulator.
Good luck