I have taken apart a wiper motor and have Isolated the ground... There are other things that can be done also to make these more friendly for robotics.
If you want, I could provide a procedure for these mods....
What is required is a few torks drivers and a solder iron and some wire and solder wick or solder sucker and an exacto knife...
I would be willing TO DO the mods for any team that wants them...
Just let me know... It takes about 20 minutes per to do once you have the materials collected...
Paul E. Rogers
Team 245