Hi Kevin,
I find the cross-slide remarkably accurate for the quality of lathe once backlash is taken up. There is no provision for adjustment of the nuts, however the double nut within the handle allows play to be removed between screw and slide.
Don't forget the cross-slide indicates the radial increment, so 4mm will advance the slide 2mm and remove 4mm from the diameter. The top-slide is direct as would be expected.
Remember the lathe is metric, so inch measurements on the dials are an approximation.
Regards, Chris