In reply to Rick Sewards:
I think I can give the all-clear on this one - I've checked the top of Box of Tricks and several routes to either side and all the lower-offs are in solid rock with no sign of any cracks or weakening. I couldn't see any sign of anything having come off Box of Tricks, though it looked like something might have come off the top of Ghetto Fabulous, but I don't think it will have significantly changed the route.
Rick