Well, I still had a couple of hours of daylight so I thought I'd have a look at this one. I'm a Pink Floyd fan, so the hint presented no difficulties! On the scene it all looked pretty feasible (but then I am an ex-rock climber!) and opted to trade off the difficulty of the mantleshelf for a (much) longer traverse. One long reach later and I had it. Returned to terra firma to open the cache, sign the log book and take the FTF certificate (still certificates left for the next 4 visits). Noted instructions for the next cache in the series, but that will have to wait until another day.