I'm glad that you mentioned that. I did my first clean/rappel on a hard 5.8 this weekend without being belayed from the top and having someone up there talking me through it the whole time, and I have to say, I must have checked my locking beener at least 10 times before I started to rappel down. I check it probably at least that many times when I'm belaying somebody. I'm paranoid, I know, but it'd be nice to not think about that constantly. Is this device someting that could help ease my paranoia?