As far as the difference in loaded vs unloaded, all of the pipes we tested had the same results loaded vs unloaded. You would have to talk to Jeff at fast on the dome design.
I had the pc's on the bike before I bought the serval setup. Before we went to the dyno I expected to be going home and ordering the cpi's. After the dyno time the pc's stayed. It doesn't matter anymore as I no longer own the bike.
Andy, I'm curious why your dyno sheet showed the serval peaking around 8,500 rpm. Even with the pc's mine peaked over 9k and close to 9,600 with the cpi's. Nate McCoy's also peaked around 9,600 with cpi's and stock carbs.