John, I will most likely build the Aristo-Cat as a Class II (that means rudder, elevator, motor only for the new guys).

The Goldberg Sailplane sounds like a great project, nothing beats sunlight glowing though open structure. That was a "simplified" Goldberg design compared to his earlier Valkyrie. I've always thought that building a Valkyrie or a Berkeley Custom Privateer designed by Don McGovern would be the ultimate expression of balsa, though the Valkyrie might be something to do while serving a life sentence. There must be several thousand pieces of balsa in that design. I have plans to it, and I still don't fully understand the wing design.