The website was down Dec. 6th and 7th. I was updating Introduction to Pressure Relief Valves Part 3 and ran into a nasty WordPress bug that deleted all of the articles and locked me out of writing anything new.
I had to revert the site to it's Dec. 3rd state to fix things. If you registered on the site or provided comments between the 3rd and the 6th please do so a second time. Sorry for any inconvenience.