[JRY]

2 years ago, we had a woefully underpowered 4wd bot that just didn't want to turn (as the breakers kept popping). The wheels were essentially in the corners of the base, with long chains connecting the 2 wheels on each side. Our problem was that we had such a long wheel base that the drill motor we were using on each side just wasn't powerful enough to get the job done. To turn, we finally took the wheels off the bot and took them to the router, giving a rounded face to the edges of the wheel.

Last year, we went with a 6wd, drill/CIM drive. We got lawn-mower wheels (the hefty black rubber ones with the white steel hubs) and used those. We trimmed the corner wheels with the router as we had the previous year, but we left the middle wheel alone, and we never dropped it. We never really had issues with being pushed around, or any turning problems.

What I really want to know is: what were the heaviest things in a 6 wheel drive train that caused the most weight headaches, because they were essential?