There are several long threads on this in the Nitroplanes forum.

Head over there.

BTW: It will fly nicely with the TT .61.

I fly mine with a GMS .76 using an 11x8 pusher prop and it SCREAMS...

Remember that you WILL need a pusher prop. A three blader is better for clearance purposes, but your choices are limited in 3 blade pushers...

You'll want a 10x7P if you can get it.

There are several caveats with flying and assembly this plane that you'll want to pay attention to.... it's not a "standard" flyer and it takes a bit of getting used to and proper setup... see those threads for more details.