John,

Before you guys get too excited, did you try some of the fuel that you run in your Saito 91? The higher the nitro, the more prone a fuel is for picking up moisture. Contaminated fuel, if it's not too bad will run pretty good on top end but won't idle for toot. As it gets worse, its kinda ragged on the top end. It hard to get the needles set.

Enjoy,

Jim