Having done some experimentation with VNC and deciding an onboard screen isn't necessary for the board I have done some sizing up for the pedalboard layout. The pisound and the Pi running reaper (mounted in an Argon case) have been attached via velcro to the board, and I have mapped out a rough footswitch layout with some Totem beams and panels.

The zoom USB interface shown is going to be the primary method of mic input for recording, but this will be mounted on my mic stand mostly with the Zoom holder for it.

The totem panel I have created is great so far; the structure is really solid, and is going to be easy to drill for footswitches when the time comes. Next step is to settle on the switch layout, drill and wire them, and then add the microcontroller.

Then I can work on powering the board from a single input and some cable management, and this beaut is done!