I look at the coroplast and we bond. I slowly put up a thumb and close one eye and cut the plastic oh so deliberately. Before I know it I have a plane to be proud of. I have gotten away from using plans and using intuition but I don't suggest that until you learn the mechanics of how a plane should be built. If it doesn't work well try try again it's cheap quick and fun. I need to build a speed demon next. My delta wasn't fast enough