I'm retired, like building as much as flying, enjoy improvising and kit-bashing, like the quarter scale Piper, Taylorcraft, Stinson, Cessna type models, have built four Chipmunks, experienced with both balsa and foam, glow and gas. I am in the habit of keeping extensive building notes, think I could return a lot of good detail to you. I don't think my shop would be quite big enough to handle 144" wingspan, but I have done up to 108". I'd enjoy doing another Chipmunk--or Bird Dog, Beaver, Otter, etc.