Yeah, I was just googling around for info, and there is some data out there about the various types of meter movements used in cars. Some troubleshooting tips, too. I'll start there with the external stuff before I tear my dash apart again. There are actually some circuit diagrams out there for electronic tachs, which this probably is, being a '92. Maybe I'll get lucky. It's already scewing up so I guess I can't hurt it much more trying to fix it. As you say, It may not be repairable. New replacements are from 200-300 bucks, but they are out there. LMC shows one for the '93 that will work, I'm told.
Thanks,
Gearhead