Im building a Top FLite Bearcat and i had to do some modifications to make the engine mount inverted. the firewall is laminated ply and balsa, the two small support formers are ply, along with the two small stringers attahced to the firewall, and the rest of the tall formers are balsa. it will have stringers and be sheeted later. do you think this will stand up to a saito 1.20? thanks, todd