I built a 4*60 with flaperons. I didn't need to do any mods to the airframe. The kit starts out with seperate servo bays for each aileron. The only thing I had to do was not use a Y-harness and connect one aileron servo to an AUX position on my reciever. The plane really flys great!

For landing I rarely use flaps because the plane just gets too slow for me. A little wind and the plane is off course for landing.

I use a OS .70 and that's plenty of power, the plane is a little slow though. Takeoff roll is about 10-15 feet without flaps, and with flaps it's about 4-5 feet. I have plenty of power for climbing and manuevers. I am at sea level, though, so if your at a higher altitude you might need the bigger engine.

I built mine stock (except for the flaperons). I have no complaints about the roll rate. I probably will extend the rudder in the future because it doesn't have as much affect on yaw as I would like.