Thanks, Rich.
Soaking is up next. I've had the whole thing
off, soaked it at both ends and in the middle
with penetrants to no avail. Nothing unscrewed
anywhere. The shaft does twist easily, just not
up or down.
Back on, now it leaks a bit but no big deal. Guess
I'll try soaking it in either CLR or 30% vinegar or
citric acid. I'll think on it.
Wayne