Sean-you can never go wrong with a 1.79 to 1.89" rollout on a Monster on a track about what you described.

Just bring your tree of pinions and change pinions after 4 minutes of practice and go finish the pack with a different pinion. Do that a few times and you'll find a rollout that suits you.

Believe it or not-you can sometimes drive better with your car rolled out higher (more top speed-less punch). Car doesnt feel as punchy out of corners so it can be easier to drive. But gauge if youve rolled out too high by motor temp and runtime. If you dont have the batteries to be geared that high-you wont finish races strong.

Have fun,
Ray