Hi Pinball,
I believe the ca got into the center layers of the material and became brittle where the hinge bends, causing them to break like anything stiff thats folded back and forth over and over again.

Im sure the hinges were Sig, they came with the kit.
The hinges had no score on them, they were rectangular in shape and if installed accoding to the plan, no way to get it wrong.
If I understand correctly, the "score" is there to provide a wicking chanell to aid in proper distribution of ca throughout the surface of the hinge?
If Im right here, having the scores wouldnt have helped because the hinges are still very secure in their slots.

Agree, ca hinges are at least 100 times easier to instsall,.........the 1st time

Dont want to scare anyone, just would like to think something good came from this.