I surmised that the combination of the "V" slot which lost its  ability to support the side of the seal and the softer Hurley seals  lead to one fracturing and that piece taking out the following  seal.   So I now know that the wear specification for that apex  seal slot is something to pay attention to.

I went to new rotors and now use Tracy Crooks apex seals (much,  much stronger than stock or Hurley).

Ed

Ed, I was thinking yesterday that if someone (Tracy) produces seals  that are slightly wider than stock, old rotors can be cut wider and  given new lease on life?
I know there is 3mm seals, but not everybody likes to use them. I do.
Joe, I'm glad you are OK. You can fix the engine in no time. Happy Holidays to all.
Buly