Clinton, Mo-based Aviation Fabricators has an STC for aft fold-down jump seats for King Air 100 and 200 aircraft. "It's a complete kit supplied in green condition with everything you need," says AvFab's Jeff Lowe, except the foam and upholstery typically provided by the aircraft interior jobber. The company's strategy is to secure STCs for all of its products, thereby shouldering all quality control concerns.