I have just jetted my KFX and I think it is almost perfect . my question is . how do you know when you need to go up or down a notch on the needle ? right now i have a 155 main a 25 pilot and the c-clip is on the third notch down . my mixture is also at 3 1/2 turns . what does the needle adjust as far as the throttle respose goes ? what are is the effect if you go up a notch compared to down ? thanx in advace guys .