Nice, a zip drive would be very handy for my Classic II. (They're very hard to find in my area, even more so if you want cables.)

At least I recently found an old SCSI CD drive at a thrift store, it even uses the CD caddy. Fortunately there was a caddy there as well. Haven't tried it yet though, not sure which CD drivers to try. (Didn't System 7.5.x have a CD-ROM extension that worked with third-party drives?)

Anyway, congrats on your find there.