Great articles on the standards. I've been totally confused by it all over the years and now understand where my MegaExo fits into it all. This brings up my question, how do I replace the bearings in my MegaExo BB? Is it something I can do myself or is this a specialized tool kind of job? I had always thought I couldn't replace the bearings in my wheels, but then found instructions and it was easier to replace the sealed bearings than cup/cone loose bearing, and didn't require special tools, just a hammer.(really, you use the axle to lightly tap the old out with a rubber mallet, and the quick release to press the new ones in.) Is it a similar job on a BB?