strikerone,

The Midstar 40 and a TT Pro 46 sounds like a great combination. I have three TT 46's and absolutely love them.

To keep the exhaust off the wing, I'd rotate the engine 90 deg. You'll have plenty of power without a tuned pipe.

It's been a while since I've flown a Midstar (flew someone elses back in 95), so I don't have an opinion on the wingtips.

Going to two aileron servos is definitely worthwhile. The weight increase is insignificant, but you gain alot of flexibility. For example, you can mix in differential aileron to reduce adverse yaw.

Good luck with the Midstar.


Rob