I just checked both my stihl engines and the mufflers off of a G23-26 from horizon hobby will bolt up with no problem.I just tried a carb rotator from horizon and it doesnt fit.Most of us make our own out of G10 board or epoxy board.This turns the carb for a straight shot to the servo.Tim could make all your items and or do the work[ive seen it].I checked my ch catalog and it doesnt mention anything about stihls but its an older catalog.I chat and trade back and forth from Ralph and hes definatly the man but you said cheap.I have a hub already made up here also.Identical to the one in my pic.Im doing the 25.9,somone said it was more powerful because its off the pro series version.