Sorry. Factory "Kit" built. ;). What i know - yes Gary built a few more in late 1980 and early 1981 producing a ? Number of kits. And plans - The wings on mine here are Huge. a lot of area and 37 ft span. No flaps but large ailerons, 10ft span horizontal stab. It is very futuristic for its time with electric start kawasaki 440, individual toe brakes ,fuel tank seat a very wide pod ,strobe light etc.... the one here is dated 1980 ;) more info later when back in hangar