[mskala]

I removed both pressure and safety valves. Confirmed both are 70mm spring
and have the pistons with holes. Pistons and springs look good, seemed to slide
in the bore fine. I assume it's correct that the safety one requires you to compress
the spring about 1/2 inch before the threads on the cap engage?

I found a piece of something stuck in the pressure valve spring, just big enough
to be caught up in it. Looking under a microscope, it's a piece of paper towel or
similar. hmm. I'm sure that it was not blocking anything right there, but don't know
how it could get there. (Last week when I dropped the sump cover there was
nothing like that stuck to the screen).