I have the SD 33% with a ZDZ 80 for power

. No complaints about being short on power, not a rocket ship but more than enough power to pull out of a hover with authority

. I would recommened two rudder servos though. I had Hitec 5955 hooked up and it was not enough

so i hooked up two. WOW what a difference, the rudder is BIG

!!!!!!! You can look on FG i started a thread about it. I have pics to if interested on what i did.