Introducing the Maak Fjørds 'H to I' module. (H2I, water to ice...)
Inspired by the guy who made/posted the Lego blind panels on modulargrid, I made a module of my own that fits/sits snugly in my case, with a working switch, 2 knobs, 5 jacks and an led.
What does it do? Glad you asked.
I imagine it as an analog & digitally controlled analog & digital filter that does some interesting cross modulation, or some such.