All right. I'm stumped. I bought a scale Cessna 150 at a RC auction last year. It's old. Late 70's - early 80's. I've removed the covering, cleaned it up, added some goodies and have began to recover (waiting on fancy navigation lights =) I've come this far and have only just now realized that I have no idea where the center of gravity is supposed to be. Obviously no manual or plans. any formula or rule of thumb? any Ideas? No markings any where except when I replaced the firewall I found a piece of wood that had "Cessna 150 20" painted on it. 54" WS 36" fuselage. Any ideas? send them my way.. much thanks...