I have a couple planes and I've noticed the same thing with both of them. I adjusted the throttle so that the idle is nice and low, the throttle cut works perfectly, and when the stick is at full travel the carb opening is all the way open .... and everything works okay .... the problem I have is that it seems that I am at full throttle just a bit past halfway on the stick. The engine will be maxed out before the opening is all the way open. Is there a way to adjust this so I can have more travel? Some kind of throttle curve or something? Should I adjust the end point to less than full open on the carb and more in line with when the engine actually hits full power? Am I crazy or is this common?