I have broken both of my monomachines today.
Beware screwing into your monomachine (or probably any other elektron unit). If the screws are too long, they may hit the PCB board and cause extreme damage to the unit.
I can attach a photo so you can see what little damage can go a long way.
The screws came with some ear-racks that I bought from someone. I assumed the screws would not cause any damage because… why would a PCB board be in the way of the ear rack holes? Well, my assumption was bad. Now, I have two monomachines where I can’t press the ‘track 5’ button and the pattern/song LEDs do not light up.
Using two monomachines was a fun ride for a while…