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If the same criteria for accepting DdRT tools/systems is applied to SRT tools/systems there shouldn't be any issues with the comps.
If these criteria were published then any issues could be solved before gear inspection.
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I see your point, however with competitions it states that every mechanical device shall be backed up. That is not the case with Ddrt, as if your foot-locking with a prussik you don't back up the foot-lock prussik.
With SRT and the use of mechanical devises they must be backed up. I guess this is my question. Would the Frog system qualify as an accepted system, where each ascender is backing the other?? Or is there still a need for a friction hitch tied above the handled ascender??
Also, people who use the frog system at work, what are you using. Do you have any concerns about the device???
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You should be fine. One ascender backs up the other. It is that rule that lets Chisholm use the system he does in the Masters.