Hi so one of the best fun models I have built many times over are the models under Plan No. RTP1276. These plans were for 375mm wingspan models for 4551 motors, designed by Ian Peacock in the mid 70's. The plans are for a Beagle Pup, P51 Mustang, Zero and Corsair models. I will upload some pics of some of them at a later date. But my family and friends have had great fun flying combat with them.