On 11/06/2017 06:37, Benedict Smith wrote:
I have personally seen 3 tost ring failures at my gliding club this season,
(the
last one only about 3 hours ago!) these were all the large rings on the
strops,
not the ring pair that goes to the release,

The only TOST rings are the ones that go to the release. Any others are
from your club's local blacksmith shop.

Actual TOST ring failures are almost unheard of.