IMO the batteries are fine. You got them as good as they can get, and those SGs and resting voltages after differences are not especially significant. When the batteries really do go downhill someday it will be obvious.
It is very unclear what that particular 75 amper behaves like. I don't remember you saying it ever did 75 amps even for the famous 15 minutes before or after the mod.
I see Randy has his adjustable voltage version 75 amper up now. The owner's manual should be interesting. Maybe Randy can say what happens to the regular 4B 75's stages when you do the mod like why that 15 min is still there, etc. No problem with the PM3 so why is there with the PM4 mod?
