@OP, yep the Panasonic ZIP is also compatible. I had a Iomega SCSI external via my Blizzard then just used an internal IDE in my A1200 Power Tower setup:
http://newton.sunderland.ac.uk/~specfreak/MyAmiga/MyAmiga.htmlI'm now toying with CF cards to replace my HDs but with mixed results unfortunately.
Just been reading some more about IDE-Fix and I'm unsure if there's a solution.
Fun times again with my Miggy.... might even try OS 4.1 when I have some spare pounds.