I bought a set of Mustang II plans with the folding wings a few years back for around $250-300. I ended up building a Swearingen SX300 instead. I still have the plans sitting around and have no use for them. If you are interested, I will let you have them for free. Just pay whatever the shipping charges from me to you. I live in Florida. Hope someone would like these. Hate to see them go to waste.