I took all the forks off to check them, but then I also checked the height of the ATC(the track between the 2 station mounting holes) as the ATC rotates relative to the table with a dial. I found that there is a 0.032" variance as the disc moves around. My understanding is that the ATC Z should be set as the spindle 'just' touches the tool and not provide any additional pressure. If this understanding is correct, then this tilt will be transferred as a Z offset to the tool when it is loaded, so we will need to correct the ATC tilt.

The tool forks look straight at first glance but we'll have to figure out some way to really confirm that they're not slightly bent. The whole nylon bolt/plastic bushing ATC design seems like it could have more potential slop in it (maybe more likely?) than the forks being bent. It never feels like those nylon bolts are ever tight.