I did this for a Grandson, this fuselage was pretty lame. I added some extra size on teh crossmembers, added gussets and it still flexed when I tissued. Got er dun, but I went back and removed the landing gear, and changed the wing to fuselage joint by adding some dowels. It actually flies.
dont think im allowed. everyone is pretty strict around here about only posting guillows planes. on the board rules and stuff it says nothing about only being able to post guillows stuff, so i would say its ok. but....