Then you might be interested in
this. It's a great idea and it seems anthon was planning on building such a device.
randy, that's a great find, congrats! Regarding that 20SC, if it dies, swap the HD for a SCSI2SD and break off the tabs on the top piece. Add a couple of nicely positioned magnets and you'd have a very nice SCSI2SD box with an easily swappable card. And that Plus will need new caps...