Well, I'm in tears again over my own foolishness. I've been shooting a video that focuses on recapping of 400K floppy drives. I hadn't begun the actual recapping but was doing some preliminary tear-aparts and testing. I had my 400K floppy drive mechanism connected via ribbon cable to my 512K motherboard, but I had the drive mechanism pulled outside the back (with the back case off) and sitting on some plastic floppy disk cases. I had a single jumper wire with alligator clips at either end connected to the metal chassis of the Mac and to the metal chassis of the floppy drive. All was going