I have the Twist and was considering either e Evo 46 or a Saito .72. I have to say that I'm glad I went for more power. While the Saito may not be your first choice, get something

that will be able to pull out of your 3-D moves with more than enought response. As for engine mounting I have no problem flying straight and true and mounted my engine

straight dead on.

Remember that what ever you choose you'll have to get the linkage to the carb.

Good luck and let us know your choice

Lefty