Tom:
Com'on Tom you know why campy uses all those weird sizes.
1. They want to keep you down on the farm...Once your tool bag is set up for Campagnolo why would you want to buy all new tools to go set up for lets say Shimano....ARRGGug!. I figured the ole marketing dept worked hard on that one.
2. To keep that Mystique thing going!
Regards
Jack (7 MM hex head) Gabus
Laguna Beach, CA
jack@shermangabus.com