Update 2022-08-17
Update 2022-08-17: The "all in a box" idea didn't work very well: it was much larger and heavier than just the pieces individually because of the internal cabling to connect jacks to inputs. Additionally, connections would come loose inside the box, requiring me to open it up and fix, often at gigs. I gave up on this about six months ago, though I'm still running the software on a raspberry pi, and I'm very happy with that.