ottopot MIDI controller

Build instructions for the project are here: https://gerotakke.de/ottopot

There's a top case for the version with LEDs and one for the one without.  
For the knobs, I suggest printing 1 and checking the fit before committing to print all 8 in one go — I have had to scale between 100% and 103% depending on nozzle size etc.
I use 10 heat set insert from CNC kitchen and 10 generic m3x8 screws with allen heads to fasten the top case to the bottom.  
Finally I use a couple of 3m rubber feet to glue onto the base to prevent slipping.
 
I have used PolyTerra PLA for all my cases. For multi-colored versions, I suggest printing the top in black and having a color change at ~4.5mm.