One thing I can say on this, if the drive is bad, you can swap it out for one out of pretty much any other Mac model with a floppy SuperDrive. The only drawbacks are that the newer models used floppy drives with manual injection, plus you might have to modify the front plastic bezel if the slot for the disk doesn't line up perfectly.

I do have a copy of the entire SE/30 schematics, but it's on the server at home. Let me get there and I'll post an update of my trace.

73s de Phreakout. :rambo: