Gameday uses pitchf/x which uses absolute height for strike zones, right? IOW, Miles and Lee have the same size and location strike zones with it. The bottom of the zone needs to be adjusted manually, unless I'm wrong about how they do it. Um, I'm not sure. When a new batter enters the box the height of the strike zone changes, but it doesn't look like the bottom changes much if it does at all, only the top changes significantly.