John, a very interesting thread. It is a fun to tinker with the airplanes but it is nicer when they work right the first time. That is a cute airplane but it has a problem with weight I guess. I have a couple of F-4 foamies that turned out too heavy for the geared speed 400 I had in them. No amount of coaxing would make them fly well. The weight just needs to be 16-18 ounces or less for that power to perform well. Luckily I have a big stack of pink fan fold foam!

Ben