FYI, the Evolution engine that comes with the Alpha 40 is actually a .45 size engine, but I don't think it's tuned for high power output. Mine's been a great, reliable engine, but it's power to weight may be a bit lacking for 3D performance.

I have a .55AX on my Mojo 40 and I love it.

Good luck. You are definitely headed in the right direction.




PS: Don't be afraid of building a Mojo from a kit. It is a really easy build.