Amen to that!
Our robot also uses a four-wheel drive, and we also had turning problems... we could barely even make wide turns on a tile floor! Our solution was to completely remove the tread from our front wheels and cut down the tread width on the back wheels to decrease traction. We left tread on the back wheels instead of the front because our bot will be heavier in back, so we should end up with a big difference in traction between the front and back wheels.
Now we just gotta figure out how to water-cool our motors. Then we'll be in business! ^_^
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"If we knew what we were doing, it wouldn't be called research, would it?"
—Albert Einstein
<X3 What can I do? You broke the tie wraps that were holding together my heart. ^_^
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