My midterm project is going to be a CNC'ed towel rack. Last week I did some experimenting with CNC'ed joints so I could learn about the proper tolerances for the joints suitable in my design. This week I bought materials and did some test cuts. I wanted to know what sized hole would be best for the towel rod. I also wanted to see what sized hole would be best for the wooden screw hole buttons I bought. I'll need those to cover up the screws used to attach the towel rack to the wall.
The procedure is simple: make a bunch of holes with slightly different diameters and test them out. The experiment was a success. I'll incorporate these results into the design and will CNC the final product later this week.