Well, I finally cobbled the parts two together into a somewhat closer approximation of a working unit.

Scanner zeroes itself on the rails at powerup . . .

Indicator Lights on faceplate appear work for film and platen artwork indication . . .

Still have some SCSI Voodoo going on. At least I get a clear read on the identity of the device in some of the terminator configs I've tested.

Flickering Garbage displays in the window in other configs.

If anyone has a suggestion other than: doubling up the terminators on the scanner end . . .

. . . leaving the termination off, mixing in a terminator on the 6360's SCSI port like it's a PB or a IIfx . . .

I think I'll try daisy chaining it with a ZIP drive whose termination I know is good . . .

. . . and start looking for my active termination board.