You might try a flanking attack: if you've got a Zip Drive, try that externally, booting from the Disk Tools floppy. Going from memory, Iomega Guest ought to fit onto a custom boot floppy and if you can run it, the Zip is about the most rudimentary, well tested termination implementation available. If that works, it will eliminate the controller bits from your SCSI Voodoo equation.

In other threads you'll find ways to boot the Compact series directly from internal Zip setups. Never really looked into it for that, however the notion of using an External Zip Drive coupled with a set of Zip Disks with universal installs of all 68k and early PPC System/OS versions with my utilities suite and some basic apps for testing purposes did cross my mind.