I Bought a JHH Hawk and the instructions had AMD all over it. Also I think Larry at JHH sell the turbine convertion kit for about $300. Be carefull on the Flaps, when the flaps are applied the nose pitches down pretty hard. Lost mine that way, Low, slow and nose down was not a good combo. As for the planes flight performance, It was great. Tracked strait and true. Awsome plane . Iwill be getting another one very soon. I had the O.S.91 with a ramtec fan.