I've got the Extra with the Magnum .28 in it. It .28 pulls the plane around just fine. I use a MAS 9x8 prop on it and have great speed and climb ability. I am however considering putting an OS .32 on it just for kicks. I'll put the .28 back in my .25 Global Tequila Sunrise. It's a blast to fly.

I used full size Futaba s3004 servos in mine and have had no problems. I agree with AllTheGoodNamesAreTaken, the HS-81s seem a little conservative, if not just undersized.

Question, has anyone else had a problem with the vacuum formed parts washing out and shrinking in the sun? My bellypan, fuselage top, and canopy all have shrunk.