[CWizard]

Pete - Yes, the tires were shaved to perfect circles and then road force balanced. The shaving took only a very small (less than 1/16 inch) amount of rubber off the highest spot, so the tires were not terribly off to start with.
Niles - Very good point about doing my own work on this antique beast. Actually, (and feel free to call me weird) that's one of the things I like about the Cobra. It has relatively simple systems that are accessible and can be fixed (usually) without plugging in a computer to find out what part to replace. But at this point, the dealer is paying the mechanic, not me. And so far, I'm pleased with his standards and troubleshooting. So I'm happy to have that support.
And tomorrow I'm gonna go buy a dial indicator!