Yeah I sure did. Ask anyone I race with, they didn't believe it either. I've raced about 10 or so club races, several practice days at my track, and the 2010 AMS race with it. I probably sold about 4 B5's that last series race. No one could believe that it had that much fuel on it, and was dominating the main.
My cousin is running one now, got right at 4 gallons on it, and I can tell it's in the sweet spot now. Maybe we can get 10+ out of it.
Yeah the only way you can tell is the head, it's kinda faded, lol.
EDIT: Search for my user name in the Werks B5 thread. I was referring to the same B5 Guss now has back in April. I know that's not proof, but it's a pretty decent timeline.