Summary

Simple holder for the tools and pens that come with the M1 Ultra. The parts can easily be cut on the M1 Ultra from 3mm basswood. With correct kerf offsets in XCS these parts can simply be pressed together with no glue needed. 

This can be cut from a single piece of 12x12 in 3mm Basswood. I used Select Basswood from XTool.

To get a nice fit in the finger joints the kerf offset settings are critical. I used the following on my M1 Ultra:
   For the middle shelf slots: -0.06
   For the rest of the holder:  -0.10

The second canvas in XCS has test pieces that you can use to test your kerf settings. The fingers and slots are identical to the holder pieces. I would suggest testing before cutting the full holder to save material.