Install the SSD and mount the LattePanda in the Titan Case.

Install OS (Windows 11 in my case, although Ubuntu would be a great shout too)

Install Reaper DAW

Attach the Pisound HAT and mount the Pi in the Pisound Case.

Install Patchbox OS, and install the Modep module for access to the effects

Mount the Pi and the LattePanda to the shelf.

I have used cable ties as my shelf has many mounting holes

Screw the passthroughs into the holes on the custom panel.

Plug the patch cables between the panel and the Behringer - it's much easier to do this out of the case

Install the Behringer and Input panel to the bottom 2U on the front panel, the shelf above that.

On the back install the Power Strip at the top. This should prevent anything blocking anything else.