Hello !Kind of frustrating, If you a increase sensitivity of the wheel, in moves in higher increments, you can get the values at about the 300, where the increments are 40 to 50, no good, if you decrease sensitivity, increments are 1 or 2, which is what I'm looking for, but, than you can go only up to 59, which does okay with the 172SP, but useless for the other birds..Any Idea ????? Yair