In reply to paul mitchell:
Hi Jon,
Thanks for that link.very interesting.
Piana kept telling Skinner to get a new harness,but was ignored,and Skinner died of harness failure.
I have a friend rather like that. I give him a rope now and again as he keeps using his past the use by date.Another friend had used a rope for 20 years.I cut that up into six pieces.
If you have a friend like that,and you can afford it,just buy them the new piece of kit.
Piana using the back up piton near the habitual abseil boulder was obviously a life saver.