Yeah, I know Dead End FX makes a board (and I have one), but as is their tradition the board is much larger than it needs to be.
No hard to source parts, even the vactrol called for can be picked up on Amazon. Would love to see it in a 125b
If nothing else, could add the pads with instructions to wire the exp pedal, or jumpers if the builder chooses to omit it.
Could also just leave it out entirely, and let the builder decide if they want to include it using the exp wiring on the Wiki
I've had no issue fitting the exp jacks next to the footswitch, but it does require modifying the jack housing (clipping off the lil bit at the end). It's snug, but works
Also, I'd like to suggest Cracked Machine as the name for the project