In reply to Robert Durran:
> Who's life is it? If they are arrogant, stupid and ignorant enough to tell you to bog off then fine, they're not the sort of idiot you want to be climbing with anyway.
> Bollocks. As BnB suggests, just try abseiling one handed on a fat device with a single strand of skinny rope and if you don't change your mind you are a liability with a dangerous lack of imagination.
Why would you be abseiling on a single strand of skinny (I assume we're talking sub 8mm, as anything bigger is not skinnier by modern standards) in a winter situation? I'v had to do 20+ abseils using 7.9mm ropes with a BD Guide Plate. I did not die. If you think that makes me a liability, then so be it. As I said, all MODERN devices will work with skinny ropes. Old devices designed for fat ropes will not
It's in no way arrogant to assume that your partner knows what they're doing, and has kit to do the job. Clearly this requires you don't climb with idiots.