Just finished to build a MIDI Foot Switch + Loop Station.

Here you can see the video of Demo, Project and complete build starting from cutting the Alu:
https://youtu.be/70x1aoqenbII used the Arduino Leonardo (atmega32u4 based board) in order to connect MIDI via USB (and MIDI cable).
If you don't need USB you can use the Arduino Uno.
As DAW I used Reaper but any other should be fine (communication is done via MIDI messages).
I've got some problems painting the labels since I used an aluminium diamond plate... any idea?
I used a marker and then cleaned up the borders with a toothpick but still not perfect...

Thanks