As part of the 3D printing rebuild, I've printed proper supports for the internal Raspberry Pi Computer Module board, daughter board, and various additional components. The original mount was a simple piece of laser cut acrylic to which the components were screwed or taped. The new mount was designed to have a custom fit for the various components, as well as bolting securely to the endcaps.
The above 3d rendering show the final design; below show the printed parts being glued together.
This new setup has proved much easier to work with, especially when the boards are removed from the ROV.