07/31/2009. Remarks by Walter van Tilborg: "The light push/pull MM-100 Mini-Master was developed by the Powers-Bashforth Aircraft Corporation of Harry Powers and Bruce Bashforth. When first flown in March 1989 the aircraft had two 52 hp Rotax 503 engines and had a 29 ft 6 in (8.99 m) wingspan.
At a later stage the aircraft received two 65 hp Rotax 532 engines and the wingspan was increased to 32 ft 7 in (9.93 m) and it was fitted with small canard wings. Development was halted and the sole MM-100 is still active in the hands of Marty Comstock."