A while back, I built an adapter to take a 10K Expression pedal and convert it to CV (0-5v). I know this isn’t useful for Dwarf and Duo users at the moment, but might be of use to DuoX users.
I didn’t see a way to attach a schematic here, but I can provide a KiCAD schematic if anyone is interested. You could modify it to match the pots on your own expression pedal.
I haven’t made a computer-generated layout yet, but here’s the drawing I made to build the second one (the first one was terrible). I’m not sure how useful this drawing is, but it’s what I’ve got at the moment
Here’s an image of the schematic, too. If anyone wants the actual KiCAD files, you can still DM me.