I have a 2002 frame. Whats the difference between the Master Olympic, Master Light, and the MXL? When were each introduced? When did the Master get the niobium tubeset?

I have a 2002 frame. Whats the difference between the Master Olympic, Master Light, and the MXL? When were each introduced? When did the Master get the niobium tubeset?

this question has been asked before and will be asked again, here's a link to a partial answer http://www.serotta.com/forum/printthread.php?t=2970&page=1&pp=40 basically i believe all three listed are the same bike frame. the real question is when did it get the niobuim tubeset which i don't think my link answers. i would like to say it went to niobium when it was an 8 speed bike, but that was when i first noticed, started to lust after one. great bike i have one may, get another, i bid on one with a steel fork last year. google your question.