Was checking the table on my Ammco after adjusting the ram gibs and found that the table was 0.007" lower on the front/outside than on the back/inside.
Removing and cleaning the top gibs, then re-assembling with the table jacked up on the support as much as it could go, got it down to 0.002" - not perfect but better. The top gibs are only half the story; the bottom gibs are probably as bad as these were, if not worse (and are the ones that control table movement). Probably have to remove the table to get those out, which looked to be too involved of a job for just-before-dinner.
I don't think the issue is wear, as mentioned above, so much as just sag - maybe a decade or two of storage with the vise and who knows what stacked on the table.
Kinda wondering how the OP's adjustment worked out. Did everything just need a good cleaning? Or was a repair necessary?
Also, open to ideas for indicator mounts, as I'll probaby fab one up. A lathe-toolpost indicator holder in the lantern doesn't work well because the clapper moves; today I stuck a Noga to the side of the toolslide, but it is somewhat unstable as the clapper box and slide are of slightly different widths. Thinking an indicol-style shaped to fit the clapper box instead of a bridgeport spindle. In the short term, probably just stick the Noga to the table and put the indicator against the bottom of the ram.