Any one know of a good web page that has a time-line of discs and the difference in them? My buddy lost a first run elite XS and I was wondering how different the plastics are between the firs run and a newer one. He is really bummin' but I think I found one for him on ebay.....Still I am interested in the different plastics from run to run....if anyone could give me some insight that would be much apprieciated. Just for fun learning.....
Chris

