Installed the pressure sensor manifold to the firewall according to Van's FWF kit documentation, rounding the corners of the Al manifold where needed to lay flat. I installed nutplates on the cockpit side of the firewall for the two AN3 bolts that hold the manifold on. Writing this "from the future" on 8 June 2014, I can say it's been on and off the firewall plenty of times already. Best tip from Bingelis's FWF books was install nutplates for everything! Once the top skin is on, there's no effin' way to put a bolt and nut together without some sucker contorting himself below the panel.