Could try a dolly as well. I saw Eric Myers Fox fly and his behaves quite well during takeoff. He has a much larger model and it's powered by a P70.
I'm using HS5645MG for both elevator and rudder. I don't like the control snakes running down the fuselage but this has been a learning project, on my next turbine sailplane, I'll place the servos close to the control surfaces and just add more weight at the nose.