I scratched my head for a while on the layout and the cutting for the right aileron. It's a little hard to follow. But I finally got it all laid out. Next was figuring out how to cut the complex corners. I settled on a combination of tin snips and the cut-off wheel of my Dremel tool. After that it was some filing and sanding. Not too bad, buy you have to be VERY careful. You don't want to have to do this over again.