Modular desk bracket and switch button holder

I wanted to make an interface, mounted on my desk consisting of touch push buttons to control my PC (switching virtual desktops, moving windows).

The setup is modular with a bracket to mount on the edge and secure with 2 M6 bolts.
The small holes take 2 M2,5 brass threaded inserts (heat pressed with a soldering iron) and 2 M2,5 bolts to secure, so you can change the interface.

One interface has two holes for switches, the other 3 brackets for touch buttons.

I connected the buttons with an arduino running some code.