The problem is not that there was not enough depth for the tap. The
hole is threaded so deep that I run out of male threads on a nipple
before the nipple seals to the manifold. If I run the nipple into the
manifold to just before the end of the male thread, I can actually
"rattle" the nipple in the tapped female NPT hole. All I really needed
here (quality wise) was "good enough to work".
Would I be out of line by asking for a re-run?

RR