I have two Hangar 9 Cubs. The older heavier version with a Saito Fa56 and the newer version with and Evolution 46. The Saito pulls the old one around nicely. I plan on getting a Saito Fa62 for my newer one. The weight of the 62 as I recall is close to the 2 stroke that's in it now so it shouldn't fly much different other than that sweet 4 stroke sound. I think the 62 will fit the stock mount as well. Not sure about the 72 or 82.