Aside from actually pulling the carbs off to set the air screws on the bottoms of the carbs to the suggested 1.5 turns out, how the heck am I supposed to turn them? Yes, they're knurled, but I can't turned them with my fingers, and even my 'stubby' screwdriver is too long to reach.
Maybe it's time to get one of those 90 degree ratcheting screwdrivers...