It seems to me that if there's no spar in the center section, and you're poo-pooing the root/sub rib method you might want to try continuing the CF sheeting out and making a sleeve for the outer section. Tricky molding but I'm sure it can be done. GL & Regards -- Stephen Syrotiak Southern Connecticut RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED]