2014 upgrade. Replaced the manifold completely, and it was less difficult than I expected, and the results were perfect. No leaks at all from the manifold. I still have to revamp the way I make the bottom part of the trays to keep leaks from developing, but that's it other than some frame enhancements.
I'm putting together another 5X5 system soon. This one was planted about a month ago, and it is going gangbusters.