I have had branches tear out on me numerous times and for the record I'm 11stone. Mostly during branch walks but I've lost my anchor piont before. Once my anchor snapped out it was the same situation but at 15 feet. Yeah the branch took my weight, but when I snapped a step to chuck the branch out the extra weight of the branch snapped my anchor. The height isn't just something to mess with your mind. At 10,15 even 25feet you might think " OK chances are this will be ok, but the worse that will happen is that I'll take a tumble and be sore for a bit. Taking that chance at 100feet is different.
I'd also like to ask the guys who say they'd do it, how may Northofagus have you climbed? are you even familiar with the species? Brittle trees full of included unions and prone to branch failures. Yeah this limb has taken some winds but I climbed past tons of old wounds on the way up so plenty of others hadn't coped.
Its true that the vast majority of tree surgeons are macho nutters high on testosterone with egos as big as they think their balls are. But infact the best climbers I know have been quiet, modest guys not the chainsaw heros. I've climbed for 11 years but I can bet that I have more experience with large tricky jobs than many guys who've been at it twice as long. I've also never met anyone who has climbed larger trees than I've been lucky enough too. Up untill this job I'd re-thunk a few but never bailed, on this occaison I'd say the risk to the climber was far from acceptable so why do it?
Some comments on here have beed daft and some food for thought. Saying some one is a great climber and quanitying it by saying they cut themselve twice is daft. How does chopping yourself up make you good? Skyhuck says he almost never riggs to reduce risk. We almost always rigg for the same reason. I think rigging involves less cuts often means better positioning and gets the job done safer. Not saying he's wrong at all. Maybe for us with the gear and staff I have rigging is safer. Maybe others with a slightly different set up chose a different approach.
I believe some people have never bottled it, it must be true because plenty have died trying. I don't feel like I've anything to prove, but perhaps this thread might be a good place to post some pictures of you not bottling it and show us what you can do.