BBC Micro Model BMiSTer Backplane

This is my first 'from scratch' design. It is a printed backplane for the BBC Model B to accept an HDMI port, a 4 port USB plate, An ethernet port and a power supply socket. It is split into two to fit into an Ultimaker 3 print bed, and utilises the space found by removing the vinyl sticker on the rear of the BBC Case.

This is for my BBC MiSTer project, where I fit a MiSTer board set into the body of a scrap (very scrap!) BBC Micro - I wanted to have a decent rear backplane, to avoid cutouts and cables through holes.

I'll update this if successful with the BOM for the ports I used, it requires cutting out a slot in the original plastic of the outer case, but the addition of this plate leaves a neat job. I DO NOT recommend using this with an otherwise good condition BBC B - this goes with one which was significantly damaged and otherwise scrap.