I don't want to sound negative here, but we have had tow of these and both of them came out to be 17-18 pounds covered in Econokote and built exactly to spec. That foam is heavy! That said, it does the best tumbling maneuvers out there!!!! It will snap if you blink wrong on landing. Pull the elevator too hard in flight--- snap! It flies very scale and graceful. It looks great with smoke on. I just can't see you coming in at 15 lbs. With the wood, I would guess you will be knocking on 20lbs.