Thanks Mark the parts of the extender board should be perfect for the job.
I've been chatting with Charles in a PM regarding the adapter where he mentioned his TAZ adapter. Charles made a suggestion to look at making a generic adapter with a flex ribbon cable so that it could be oriented in any computer case which sounds like a much better plan.
I did start to vector draw the original Fuller adapter last year prior to actually creating the PCB design in the software (which is all new to me) With the Fuller case and it's internal vertical connector I suppose the adapter could be mounted that way with perhaps a plug in cable in the design to pass through to a second edge connector mounted on the back of the case to replicate the setup of the original adapter.
Personally I am looking at changing the the bus connector to a 2x25 female header instead of card edge and matching with a 2x25 shrouded or box male header connector for peripherals. (Mechanical forming of pins to match current card edge connector pin spacing would be needed)
Permanently soldering the 2x25 female to the main board is my planned conversion for one of my designpaths. But I can see stress on connecting and disconnecting joint may become a problem. Long term use will tell how reliable. I am also interested in determine if there is "rampack wobble" failure with this approach. I would expect none.
For anyone else interested also, here's the card template I made last week compared with an actual Fuller extension so I now have the dimensions to start to work on the PCB design in my attempt to replicate it. (the issue 3 board in my half of the photo is a little lower than its correct position as I've not yet drilled the holes for the ports in the Fuller case in that orientation)
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The track layout on the main board would need to be arranged to accommodate the through holes that the pin header will fit in.