In reply to 3leggeddog:
Interestingly the twilights are marketed for rock climbing !,i bought a pair this summer and they feel lovely to handle yet dont feel like they will tangle themselves up,not used them in anger yet(got them for the ice) but im sure they will end up as my mountain route ropes.
I will carry a spare buggette with them in case by belayer dosent have a suitable device ( as i did with my phoenix ropes).