My finish for the holder is done. working with 1/4″ plywood on this project was challenging. Ideally, I would have had a 3/4″ block of wood and a router to remove the recessed areas. Maybe one day, I will do so or have it done by a professional. Anyway, the DIY is functional for me. Pics later today with the devices in place again.
Waiting for the epoxy to cure overnight. Hopefully with a strong bond