I decided to scale up my Fun 51 plans. I have a plans built Fun 51 with a Magnum .52 4s that flys great. I have a twin Mustang P82 built from two Fun 51 kits and highly modified. Just could not resist having one just a touch larger for the Saito .82 and a set of mechanical retracts I pruchased new for a project that never took place. Have all of the parts laser cut and have started assembly. I will post a few pictures of my progress, should build quickly. Decided on a 51" wingspan, what else?