speed run help

Ive been bitten by that go fast bug. A few things I wanted to know.

1. The bearing on the slipper is the same size as the ones in the wheels?

2. What gearing do you all use for speen runs? I'm at 28/76 myself. That bad?

3. I know I need a radar or something to track the speed so any sites other than ebay?


My set up is MM 5700 and I'm using a SPC 6cell sport pack.

Any and all help is greatly appreciated.