Not going to get into tuning an engine but I will tell you how to keep your plane from rolling around. You have to tighten up the wheels!!! I use A washer between my wheel and wheel collar, between the washer and collar I use A small piece of fuel line. Add pressure onto the fuel line with the wheel collar and your wheel won't be so free wheeling that you have to chase your plane around in the pit area. Trust me, it works!!