Ive got two pairs of Carbon Poles, and a singly light alloy one. I don't like poles! Ive tried and tried to get on with them, I know how to use them properly but on descents I can move faster and steadier without and on stepp ascents being an ex fell runner I prefer knee pushes.I do know many ultra runners that run with poles, but I cannot see how they benefit from that, maybe many runners and walkers who do use them do so because they seem to be part of ones neccesary equipment these days, afterall everyone has them don't they, well almost everyone.As for the Spine Challenger, John.During my 5 Spine races, I have made the Challenger distance 4 times with an average of 54 hours and have never used poles, although I always carry one just in case of an injury. Ive also walked it in the Summer carrying bivvy and cooking kit in 50 hours, without using poles. You are clearly a strong walker so I can't see you having any problem in finishing within the cut off time, but if you consider that poles may be a help, if only psychologically, then why not.