Can someone tell me what adjustments an "operator" would have to make as each batter steps to the plate? As I understand it, PitchFx or whatever the system(s) are called requires an operator to adjust the upper and lower limits of the strike zone. Maybe they could incorporate something like NASCAR and have a laser inspection - before and after each game - and measure the distance between the hollow beneath the knee cap and whatever the top of the zone is defined as. If you want precision, you will need to have precision on the front end when setting up each individuals strike zone.
Forgot to add - the player cannot change footwear between inspections.