I know it's been done before, but I figured what the heck, I had some spare servos, a Grayson hobby disposable combo on the work bench, a sheet of Dollar Store foam board, and nothing better to do. What I got is a very easy to fly, fun, and cheap plane. I took a 20" square sheet and cut the corners to make all eight sides 7 7/8 inch. The elevons are 3" in and run all the way to the outside. Cut out a rudder with 3" control surface, slapped it all together, a spritz of red paint and white duct tape and chucked her in the air. Nice tight turns, inside and outside loops for days, inverted, you name it, she loves to do it.