I went with a 12 x 4 Zinger yesterday (closest thing the local hobby shop had) and noticed a definite hover improvement with the 50 SX. Barry and Rocketman, thanks for the sizing help - I'll be placing an order with Tower soon.

GJeffers, The extra power offered by a 72 four stroke would be great, but unfortunately it just isn't possible right now. I am impressed with the 50 size though. Considering its small size it pulls that plane very well.

I am trying to determine a good way to route the exhaust from the 50 SX down below the wing. Does anyone have a suggestion that won't hinder performance while keeping the exhaust residue away? So far I've played with a piece of silicon tubing but needed two bends to get the look and deflection angle that I want. This configuration lowers the exhaust note slightly - I have yet to measure an actual reduction in RPM but I'm guessing it is fairly substantial.

Thanks again,
Rob