Originally Posted by carleton
Yeah, but when you do a cost/benefit analysis. It's actually cheaper to let the LBS do it than to buy the tools to do it yourself...unless you are changing headset and BBs all of the time.
At my local shop the BB tool was the same proce as getting the bike shop to switch the BB. Paid once and now I can do it myself forever (until I bought a few different BBs which needed different tools).
To the OP - if you arer going to convert an old 10 speed then take the old BB out with a big adjustable spanner and then get a shimano sealed unit and the tool to put it in. Should work out well in functionality and cost terms