[russell]

Potentiometers are good, and (at least if your robot turns out to be kind of a roughly built machine) you can generally find a way to attach them after the build process, though if you can incorporate them into the design now then that is even better. Just remember, when you have to sort of calibrate them every so often, especiallyif you are working on the robot allot. I would say more but my spacebar is starting to act up so I will just leave it at that.