I would like to do the CR2032 coin battery install in my Amiga 3000T. I was wondering if I could desolder and remove R192 and replace it with a 1N60 diode. Also, I noticed that there is both +5 volts and +12volts in this circuit. How exactly does the charging circuit work and can I remove it completely? I have to redo the zip memory, because I mixed up SC and PM zips, so I might as well take care of the battery issue too. The battery area of the motherboard is clean.