i'm not a fan of phil lockrings. the notched area is too thin and it makes them a bit fragile if you change cogs frequently. i actually just bought EAI (campy compatible) lockrings to throw on my phils the next time i change cogs. they're far beefier. pauls are also campy compatible. trackstar just gave me the rundown on campy compatible lockrings last night. how fortuitous.