[Mikendebbie]

Lynwood said "I have an issue with the word sudden. It just showed up after the “totality botched” cleaning job. Did the person that buffed it get it too hot or was the crack already there and you just hadn’t been it or looked close enough to notice?"

I agree with your statement about the person that did the buff job.

When I used "sudden" in post #20 above - I meant like a sudden impact/strike like a baseball hit or similar crash...the kind you hear or feel and KNOW something is wrong. You would see a spider pattern at the point of impact. I found the pic below on line. The OPs crack looked like a result of a big slow wide-area bend - not a sudden impact...but I am just guessing!

We do tend to get in the weeds on some of these threads, and the vast majority of the time - I probably have no business getting in the weeds because I have no experience with the topic. But I have a good time learning from the guys that do know what the weeds look like!