Todays Project - What did you do today?

[awemawson]

Presumably it's all to do with how the dovetails of the vertical slide, and the appropriate gib strip have been worn over the years. That almost certainly varies depending how much you wind the table / box thingy up and down. I'd be a bit wary of just skimming it flat before a bit more investigation, as that amount of droop implies it's going to be a tad loose in the vertical location department !