In reply to Aztec Bar:
hmmm next time measure and mark the part of the rope used for the tow before. Then allowing a suitable time for the rope to settle back to as near its original size as possible measure again. The difference is how much the rope has plasticly [sp] deformed.
I would suggest any permanent deformation is undesirable but then when I replaced one of my pair of half ropes I was surprised to find the new one was a good 4ft shorter than the old one. It could have been made that way, shorter, or all the falls I made on the old one permanently stretched it, or is it just hanging 50m of rope over a ledge and rapping off it has permanently stretched it...?
Is all this too scarey, should I burn all my ropes as they are all dangerous and start free soloing as it is safer?
Im going to make some coffee.