This is a project I've been needing for a long time. When I use my CNC router table I would just layout my cutting tools. Most of the time they would roll around or fall on the floor. With the tool holder I place all of my tools, collets, and I can place the tools I need in the order I will need them in. This is the first step. The second step is to make an arm and attach it to the computer stand down tube.
I made this out of plastic wood but almost anything will work. The material is an 1" thick and all the holes are 3/4" deep. The pocket is 1/2" deep. I included the CAM file for MACH3 (use at own risk not libel for broken tools, works on my mill)