I think as well about people who created accelerator boards, and recreated the functions of the logic board at various levels of sophistication. There are (I th

I think as well about people who created accelerator boards, and recreated the functions of the logic board at various levels of sophistication. There are (I think) 68030 upgrades to the original Macintosh Plus, for example, that add RAM way beyond the wildest dreams of any owner back then. I think the greatest achievement here was was the Radius Rocket Stage II, which was essentially an entire logic board on a NuBus card that claimed to System 7 to be a Quadra 950, but was essentially a diskless, portless Mac that could be run independently of the host system!