The Catwalk Ribbon Controller is Waveform's DIY Project #4. This takes up no HP by attaching to your Eurorack system over top of existing modules, where it rises above the faceplates of the modules they're over top of so there's no contact with the modules below other than the screw holes where the standoffs are. Super fun, kinda weird, and very touchy feely, this uses an LFO, offset, or something of the sort to power it, and we think it's the cats pajamas. This mounts over screw holes that span 35-37HP. The instructions on how to build this are detailed in issue #4 and can be found on our Build Guide page. Faceplate is black with silver.
Note: These come with M3 screws and standoffs.