The L1011 wing repair Flexible Response refers too did not involve a wing replacement at all. The rear spar failed between the MLG trunnion and the root and there was no replacement spar cap material available for a repair so a section of wing containing the rear spar from MLG trunnion to root was removed from a parted out L1011 and spliced in. All done under a Lockheed approved scheme. The rudder trim might have been OK but it flew decidely one wing low and needed about 4 units of roll trim which was rigged in so the pilots set zero trim but the ailerons were offset to make it fly level.