Thanks for the reply. I am becoming more convinced that this is a Sig Kadet. Sig has no plastic wingtips available. I downloaded a contruction manual from Sig so I will build the tips. I am current now even tho I stopped building and flying for 25 years. I am a long-time full scale flight instructor plus I currently am flying my big Cub, an original Kaos 40, a large Showtime 3D and 60"+ Top Flite P-40. I want to use the Kadet because my wife and I built it and I think it is still an excellent trainer. It is powered by a K&B 40 which still runs like a well oiled sewing machine.