one other thing that may be helpful. open and close the binding without the boot in it a few times to familiarize yourself with how the N.A.S.T.Y system works, I found when I did adjustments if the screws were not in just right, the ankle strap would tend to pull down on one side more than the other. this is not how it should work, both sides of the should raise and lower correctly.
Also when you put but in and out of binding, put boot in at an angle (toe down heel up) then slide it towards front. The heel area is very narrow and you won't be able to just slide forward whole boot, toe goes in at an angle, then heel drops down as toe slides towards toe cap/
Hope this helps, and Good luck. They take a little time to really dial them in, but once dialed in. they work wonderfully.