"Steve Robertson" wrote in message ...
Gee, I don't know ... Is it better to have a 1/8" section of 1/16" (sic) rubber
instead of cork? Could it be that there is no AD because there has never been a
failure? Somehow this one doesn't get me nearly as worried as you seem to be.

A far more common failure is the failure to install any seal on some of those
accessory mounts.