I need serious help. I bought a used Lemond Tourmalet with Shimano RSX components. Needless to say, the RSX STI shifters are dead. I don't want to get screwed again by getting used shifters off of ebay but I dont' have much money to play with (stupid college...). From what I have read on RBR, I will need to replace my cassette (its a 7 speed ?!) and at least my right side STI shifter. I'm thinking of just buying the set of the shifters because I think the left STI is just about gone too. Do I have to replace my rear derailleur if I get an 8 speed cassette? How do I know if my frame supports an 8 speed cassette? Is my 7 speed cassette compatible with an 8 or 9 speed shifter (just to remember not to go to that 8th or 9th gear..)? If I get an 8 speed cassette, how do I know it will fit on my bike hub? Sorry for all of the questions and thanks for any help anyone can provide.