Just about got this thing dialed in now. the problem I was having in the past was that, according to the manual, you should open the high end needle 4-5 turns during break in. this caused an overly rich setting that made the engine bog down at higher throttle settings. I tuned it, still rich, to turn a 20/8 Zinger Pro at about 6800 RPM's. the manual says to break in at 6k. a few seconds after I throttle down and kill the engine, I can see smoke. I used 5% nitro 20%oil for the first gallon, and Cool power FIA fule for the second. the smoking occured with both types of fuel equally the same. is this normal or should I run it even more rich?