As you can see below, this is what I found when the heads arrived: "Crack" written in bold yellow paint, hash marks indicating said cracks and on the other side scrawled in yellow paint also, "mag ok". Naturally, I was dubious about the latter, so I carried them off to the machinist where they FAILED magnaflux, cracked exactly where indicated. Also found, a damaged area filled with some other metal, maybe nickel, and also separating from the base material.
The other looks OK.
Mr.Ryan answered my call promptly and claimed he was not aware of the condition of the head, because he didn't pack them.
I could exchange it, but would have to pay return shipping - $77.00.
He couldn't send me another set right away, after all, "he has been burned before and you just can't trust people anymore
My thinking is that this head should be scrapped and be removed from circulation. I also believe that he has the responsibility to inspect personally any merchandise and pay for return shipping if a defective part gets sent out. I also believe that he should have sent a replacement immediately, instead of delaying my project any longer.
I will update when the replacement head arrives and is checked...