Well, I knew it might not be that easy!!

Are the 24 tooth aftermarket sprockets interchangable with what I have or am I looking for a particular type or brand? I'll probably let the LBS mess with it, so I assume it is something they can order from QBP. I'll wait a while and keep on reading here, might learn something!

I'm not readily seeing the HG-50 model cassettes on the Shimano website, looking around on the computer I see lots of 11-36 but not a lot of 11-34. Looks like the XTR model would save me nearly 1/2 pound but I'm unsure I need titanium or the cost.