Thanks for the input guys, I'm going to stick with the Mazda rings.
Quote:
Originally Posted by chibikougan
It was running Mazda OEMS and they where fine after the whole maybe 2k miles. 
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I probably could have reused those rings; they still looked & fit like brand new... But my general rule of thumb on rebuilding anything is if it's a soft/rubbery part, chuck & replace it. That plus I may have nicked them while removing for cleaning the rotors/metal rings & springs, or may have exposed them to cleaning solvent during the process.