Installing a lock mount on a carbon fiber frame Let's ignore the question, for a moment, of should I install a lock mount on my new TCR Advanced.  But assume that I want to.

Given that the frame is carbon fiber, should I be worried about the forces the mount clamp will apply to it?  Should I be worried about the (perhaps unusual/unplanned) stresses the lock and mount will apply to the seat tube while I'm riding?

If we take it as a given that I want to have my lock mounted on the bike (and not in my bag), is there a better suggestion on how to do so than to use this on the seat tube?
I've mounted lights with similar clamps on carbon forks with no ill effect (just have to be very careful not to over-tighten the clamp) but a lock -- which is heavy -- might put a too much torque on such a small clamp.  Maybe if you could spread out the area over which the clamp attaches to the frame then it might be ok.

What about attaching the U-lock behind the seat?  Hang two loops (tie wraps, wire, string, etc.) from the seat rails and pass the straight portion of the lock through them.  Then secure the bottom of the "U" to the back of the seat post with a velcro strap (put some padding between the lock and the frame so that the lock doesn't bounce and scrape the seat post up).