Modular Tool Holder

This is a WIP. The following is an animation of this https://youtu.be/94sn78UXnhc (the stick should be on both feet and it can be longer as needed. You can go into 3D builder on ANY windows 10 computer, and increase to a desire length)
This is a modular tool holder for the IKEA Lack table. But it should be able to be used with other items/thick tables. Basically, I wanted to make a modular unit so I can add on to it or take away as needed.
The front, mid, and back is pretty much done. You put