BNC mono portrait monitors are not ultra rare... might be worth a try before you uninstall anything.
Fortunately, if I do come across one, it's not a big job to pop it back open and re-install the device. For now, I don't need it flopping around in there.
Does that daughter board piggy back on the original ROMs on the logic board or replace them altogether? It's a shame if the originals are gone as they are difficult and expensive to replace. The 400k drive and bracket may prove easier to find if you're after a restoration.
From what I can tell, the board is plugged into sockets where the ROMs would go. So I think it's safe to say the originals are gone.
I didn't realize they were that rare.
