In reply to gaillard:
You are a liability. I don't understand your diagrams, therefore you are making them more complicated than they need to be. You may still understand them right now, sober in your warm dry home or internet cafe. That's not the point though.
Personally I think the primary reason for lethal failure in any circumstance, is hardly ever, no actually frick it, given how rarely factor two ish falls crop up, cause of death is never ever ever fricking fricking ever due to a subtle mistake in the precision engineering of a fancy "the bestest" belay or abseil anchor "in the world ever", such as you have constructed. It's due to human error.
Can you build those anchors yourself when you're numb and/or have no co-ordination and/or aren't thinking straight? Or have altitude sickness, are distracted, very fatigued, or merely just a bit loopy?
When we are thinking straight as the majority of people reading this now are doing, most of us can set up a safe belay. In my experience, outside of the bolt protected mountains I guess, due to nervousness, fear and the unknown, even most of those people who can't set up a belay are sensible enough to either be really bloody careful or get someone who's better at it to check their work.
When we are not thinking straight, none of us need to set up your belay, and should that proportion of us needlessly seduced by it try to do so, a greater proportion of accidents will occur.
I've witnessed no end of idiots online here over the years but it's a rare event on ukclimbing.com when I come across someone who I not only wouldn't climb with. An incompetent french aquaintance of a friend of mine, may have killed another though his incompetence. But to find someone not only who I would tell all my friends not to climb with, if asked. Or even if they didn't. But someone who I would plea with everyone in the entire world not to climb with? Given that sadly in this day and age, noone will simple ignore you, you sir, need help.
Unless you can shout really loud at him, or take some money off gaillard in order to instruct him, I must recommend: Do not Climb with Gaillard.
Anyway, I learnt something today, just when I thought I knew the limits of human stupidity, I found I didn't. Thankyou ukc.