70 oz servos should be just fine. I'm running the 120AX in a profile at the moment. Wonderful motor. A side benefit is its very cheap to run, since the airplane is overpowered. What I mean is I spend lots of time at low throttle settings so it doesn't use much fuel. I use a 17-6 APC with mine. It turns it fine. Tons of thrust. A lighter wood prop would give better spool up, though.