I was going to track down a tool for my Record 10 bottom bracket, but the I read on one site that the same tool does the BB and cassette lockring. I already have a lockring tool, will it work? The reason I don't check myself is that I don't have a good crank arm puller, just my old beater. I was going to buy a new one at the same time. Maybe I just need the puller?

Yes, the tool for a Campy cassette lockring and a Campy Record BB is the same.