I've been using V brakes with travel agents on my bike, but I recently purchased a set of Tektro CR720s to replace them. As my Gunnar does not have a braze-on rear cable hanger, I bought a Tektro rear cable hanger (this one: http://www.bikeman.com/BR7151.html) that hangs from the seatpost bolt.
I put it on tonight, but it's really loose, even when I tighten the seatpost bolt. Is this going to be a problem? It seems like it would get knocked around and throw the brakes out of alignment. Any suggestions for installing this correctly?