I also thought that the tail wheel springs were loading the Tail servo too much so I modified it like the Extra 260 H9. I have installed a Thunder Tiger 1.20 I had to modify the motorm9ut because the engine was to wide for the default engine munt spacing. I am also in staling a TME smoke sytem. I aso found the included hardware a little on the soft side, so I replaced them with harder capscrews. I waiting for a Slimline Smoke mufler and that will be all I need to complete.