Originally Posted by sandycohen
PS - Sorry for not replying to your concern re: failure - I have a keel stepped mast so this is less of a danger
I don't think we need to actually crunch the numbers to realize that the lever-arm on the mast as it passes through the deck (mast partners?) is tremendous. If the backstay tensioner fails with boat on a run (just when the backstay is really needed to keep the mast up), and there is nothing left to keep the mast from bending forward, I seriously doubt that the it's is going to be able to resist that sort of bending moment.