what is a twin-plate crown? is it a crown that's made of two seperate pieces and brazed all-at-once? is it a crown that has a decorative groove in it, or a groove that allows back to be seen through the front? is it a crown that has a B.H.H.* on either side of the steerer? i have had the B.H.H type on my personal cross fork for four seasons; some of the team's forks have had these on for longer. all have cantis, and no failures have been reported. e-RICHIE chester, ct *means big honkin' hollow