Greetings!

I still have no proof that this is the root cause, but I suspect it is. I replaced the drive cable, drives and everything else in path. When I was taking the photos, I was able to feel a small gap, as if I could slide a piece of paper under the pins. I think it is pulling free.

I am not certain of the reason behind this, though. Could it have been caused by the exposure to swings in temperature? Could it have been from physical pulling when removing the cable from the header?