[Bob Bidonde]

The inevitable is a change to a 12V electrical system with an alternator. I think that the manufacture of 6V batteries is going into history. Also in my opinion, every Model "A" should have an auxiliary ground cable.
For the record, having run 12V in both my Model A's for many many years & miles, the stock starter motors work extraordinarily well, and I see no ill effects to the flywheel ring gears. However, the stock Bendix Starter Drive is junk, so I converted both starters to modern starter drives that are made in the USA.