Chris Bullock did a video where she talks about the Arpeggiator. She put it into a plastic cake dispenser (!!!), along with the AAAPPPCCC from Look Mum No Computer.
You can hear the result here : https://bpm-bonemusic.bandcamp.com/track/cursed-playground-ymnks-arpeggiator
Also, knopsl from Reddit, helped me a lot by troubleshooting my first MIDI looper circuit, which was wrong and had some pin issues regarding MIDI in and out. Many thanks to him! Here’s its creation :