I have a Super Tiger 51 one of the older styles that has been moded by Tom Dixon in Atlanta that I'm going to install as soon as I build it . Stuka Stunt Works has Masdusa engines that are very simular to the Tigers . If you have access to a Stunt News mag. this will shed some light. If you need an address get back to me ,I dont have it in front of me but I can get it. Or look in Tower Hobby's web site ,go to the web directory and look for P.A.M.P.A. site( precision aerobatics model pilots association )