I would think that too, but didn't he say that the tape and rope burned out 3 different times at exactly the same location within the rack?
If that's the case, I would look for an issue with the way the tape/rope was installed. Possibly getting kinked in the process of the installation. Other than these 2 possiblities, I'm at a loss.
BTW, thanks to the OP for the pictures. I wish I had an answer for you, but I really don't.
Good Luck!
Jim Smith