Well, the new battery seems to work much better but there are still unexplained things affecting the droid's performance.
This morning I moved my truck to the other side of the driveway to test the droid on a "clean" patch of driveway. The other side was all scuffed up from the tires. I wanted to see if and what was scuffing the driveway. In the test this morning, there are now a zillion tire marks (some up to 18" long) on the driveway. This means one of the tires (I think the right one) is dragging under certain conditions. I have no clue what that could be. Possibly motors not mounted exactly parallel? Or maybe a bad motor? Or a speed controller/transmitter that's not calibrated correctly? Or ?????? If anyone has any clues, please let me know. I'm pretty much baffled as I sit here. I thought the old scuff marks were from the old front center caster dragging. Not so.
It's never ending droid madness around here. The to-do's multiply exponentially. I will be glad to finally finish this project. After that absolutely no more robot building for me. I'll improve the bots I have but R2 is the last of the line.