I fly mine with a BME 44 on the nose. I started out by tearing all the covering off of the fuse so I could redo some of the frame work. I used a dremel and very neatly cut away some of the ply in the very back of the fuse. I also framed up some mounting areas for servos in the tail. Another thing I did was heated up a wire and cut some of the foam out of the turtle deck. CHECK the INCIDENCE of the rear stab and the main wing. I found a center line for the fuse and the set the stab incidence to 0, the rear stab started out at 1 1/2 degree positive. The wing was pretty close to 3/8 a degree positive when I did this, so I left it alone. BE VERY WEIGHT CONSCIOUS. With a BME44 I was able to get the weight down around the 13.5 lbs area, not bad considering that the same plane with a YS 140 weighs about 12.75 lbs. Good Luck, JEFF