I'm looking at replacing my crank soon and may swap out the BB as well. From what I've read here, torque isn't that big a deal for the crank arms, but what about the BB? I could go with a spanner, but how can I verify the torque? The other option is to use a wrench attachment and verify the torque that way. The BB I currently have is a FSA MegaExo and I'll probably be going to a Hollowtech II. What is the better solution?