[scottb]

When was the last time you replaced all of the bushings? If you haven't done it yet -- do it. It sounds like the bushings in the shift coupler may be getting sloppy, causing the nicking problem. You might be able to simply adjust the coupler without replacing the bushings, but if you haven't done the bushings yet you'll be amazed at how much better the car shifts after you've done the work. Look in Pelican's Tech Articles for the article on shifting improvements. It will explain how to adjust the coupler. Also, Wayne's book does a good job as well.

Good luck!