I think the Balsa SA Swizzle stick series was based on a construction article in RCM. The concept was a simple fuselage that could be built around any spare wing you happened to have laying around. I built one for a 15 using an old live wire trainer wing. They could be a bear to take off grass. They were spinning fools, al right. I think RCM still sells the plans. Tey go together quick, if you have an available wing.