No real update for today. Got the tires for the Lego wheels and updated the model slightly to reflect real measurements. Also added all hardware to the model to better show how the mechanism will operate:

Started modeling the holder for the slide, I think just a corner with a sliding clamp (will have a small rubber foot on the clamp to put pressure on the slide) will do. Hopefully the tiny Y-axis motor can overcome the friction of the assembly on the microscope's table.