Sounds as if you have a first-class mower on your hands. I've never played with one like it, but from reading the manual, I'm impressed (though of course being Honda, they made it way more complicated mechanically than seems really necessary). You've got the right mower, and you've got the manual for it - life should be good for years to come. Once you get more used to it, you'll probably find a sweet spot on that idle mixture adjustment. Remember, it has to be idling at 2,000 rpm before the adjustment will make much sense.
