1. If it has a 'c' clip holding the lever its gran sport/tipo and looks correct
2. Newer model...maybe Record maybe not. 'c' says otherwise
3. Pre cpsc...wrong nut
4. Pre cpsc wrong nut
6. Pre cpsc...looks correct
7. Pre cpsc...looks correct
8. Post cpsc...wrong nut
9. Post cpsc...looks correct
10.Post cpsc...looks correct



3,4,7,8 have incorrect nuts. Swap 3,4 nuts with 7,8 nuts. 3,4 will now be correct but 7,8 will not. That's the best you'll do with acquiring more more 'mushroom' nuts.