I primarily use Sketchup to design prototypes for 3d printing. Most of my models are small mechanical components with tolerances in the ±0.02-0.1mm region. Right now, I’ve configured Sketchup to snap to 1mm increments (via the Model Info window). As far as I can tell, this is the smallest that Sketchup will snap to. I would really like to be be able to snap to 0.1mm increments though.
If there’s a way to make this happen, I’d love to hear it. Otherwise, please consider this a feature request.