Haha sounds pretty boss. Like the type of thing that will still be fully working in someones collection decades from now.
Mostly I'm just looking for a drive that's compatible but is much smaller and lighter than the original CPS3 drives, in order to make things a little easier swapping the board in and out of my cab. I grabbed a slimline HP SCSI drive for a few bucks just to test it out, but all of the 50 pin adapters I've seen for the port it has (a 68 pin high density centronics) are just for the main SCSI cable itself, and do not include the 4 pin molex for power.
I doubt the SCSI port on the CPS3 supplies power, so I'm doing a bit of research now to see if there's a simple way to get it to work.