[mattmets]

I'm in my third year of umpiring. I've had the plate quite a few times, and I feel I have a well-established strike zone (fairly large). My problem is that I find myself being inconsistent, especially high and low. I used to use a strict box stance and found myself calling low pitches quite often. Last year I switched to the GD and found that seeing low pitches is much easier. However, it is still a problem. Anyone have any advice for becoming more consistent with knee-high pitches? Is it just a matter of gaining experience, or is there something I can change when I work tomorrow?