you can grab the TL-FC15 with some channel locks or something and it won't harm it too much. But don't put it back anywhere near so tight. It's supposed to be 1Nm which is practically nothing. What I do is tighten it fairly snug to make sure the axle is pull all the way through the BB. Then I loosen it completely. Bring it up to contact and give it about 1/4 more of a turn. Just a light grip on the tool, if you're squeezing it, you made it too tight.