I'm concerned about that too. I just put a new headset on a Surly Steamroller and I'm concerned that maybe I got it snugged up a little too much. How do you know? I imagine that's a difficult question to answer. I have a lot of strength in my hands and always seem to overdo it unintentionally. I just used a regular hex key to do the job. Is it possible to damage the headset or anything else topside?