Ill keep that in mind mate, I mostly fly aerobatic electrics mostly and a ST45 ST51 TT61 or an OS120AX 2-stroke. So im not used to 4-strokes at all, in the ultimate I had it in it just didnt perform, and im not so sure how it handled being inverted, very smokey in the low end, and impossible to adjust, smokier than any of my 2strokes. Ive got probably 20 differnt aircraft id like to try it in, but i just cant get it tuned properly. I even went out and bought a Panic fun fly to chuck it in, half way through building it i decided to get out the ST51. So now its just sitting there, waiting to be tuned.