Because i am lazy i would like the quick and easy answer. I am looking to put the campy 10 speed 13-29 cassette on my bike for a steep hill climb up Mauna Kea in Hawaii and was wondering if anyone knew if you could put in on a 9 speed campy drivetrain minus one cog. My 9 speed cassette is all individual cogs with their spacers but i think the 10 speed has a couple of grouped cogs. Anyone ever done this? Thanks for any input. I guess to clarify further...i was wondering if i could take the 9 speed spacers from my 9 speed cassette and use them in the 10 speed cassette and take one cog out.