0.03mm backlash seems to be as low as I can get at final testing. (0.0012")
Machine has AC bearings & DFU nuts with extra shimming installed.
Would you say it sounds about right?

Mach3 Comp nudges the table if it's set above 0.125mm but I hate it's stop/start nature anyway.
Will likely only use it on important circles and arcs.
The rest of the time I'll use the stock to leave to add the 0.03mm on the parts or tweak the drawings if closer accuracy is required.

It is only a benchtop