Only ever ran with an OS engines and Supertigers, well besides the one Evolution engine I bought(MISTAKE[:'(]) Anyhoo, was thinking about puttin a Supertiger .51 in my cherokee. I will have to put a pitts on it of course as the mufflers could be mistakes as nothing less then a missile. . I had a Supertiger .61 on my Seagull models edge 540(.46-.50 size) but only broke it in and it was a nice motor. Got outta the hobby before I had a chance to fly her. Any suggestions? As a matter of fact, anyone with a decent 55ax of 46ax for sale (as I need one for the trainer I am putting together for my father) ill take it! Thanks