I forgot about a non-working PowerBook 180c that I had, so I took the HDD out of it. I got a Y adapter cable for the power. I was afraid it wouldn't work, but I had hoped that since it was a laptop HDD and the other basically a floppy, that it wouldn't strain the power too much. So far, so good.

I need to work on cable management, but it does work! LC with GigaMO 2.3 GB MO drive in one drive, floppy in the other, and 180 MB HDD.