RE: What will a 50 cc pull?
skillet92, I flew at your fall event in Camden this past year. I own a 88" Yak 54 from Extreme Flight. I run a DA 50 on an MTW 75 pipe from DA as well. That motor turns a Vess 23A at 7600rpm and pulls my 18# plane with AUTHORITY. I owned the Aeroworks 50cc Yak QB prior to this plane and liked it. It's a bit easier build, but the EF is a better plane with a MUCH lighter feel. It is more stable in both upright and inverted harriers and has unbelievable control authority.
Bottom line, you won't go wrong with the above combination. My second choice would be the EF Extra 300. It is lighter and faster in the air. I got to fly it at the FX3D event last month in Florida. Can't go wrong there either.
I'd invite you to come fly with us and try the plane for yourself, but the motor is back at DA for a checkup after 300 flights.
Doug