Yeah... I'd dump the F201 in stock form too if I were Tamiya. It's a shame because we have 17 racers who all own the F201 but would never bolt up the stock stuff just to run 5 minute races across the country.
We've engineered it into a great car capable of beating just about anything on track.
I ran the F103 with a 4.0 ratio on a tight carpet track with the black can and I think I could of gone a little higher since the black can has more grunt than the silver.. or so it seemed.