Things to look for: The fin box has a hole on the side toward the back of the board.
Board Models: Adventurer 9'10", Adventurer 2 10'4" (summer 2015 to present) iRace 12'6" and Xplorer 14' (from the end of summer 2014 to present).
Things to look for: There is a built in hole for the screw inside the narrow fin box channel.
Board Models: Adventurer 2 10'4" (before summer 2015) and older versions of the Xplorer 14' (sold spring and summer 2014).
Things to look for: There is not a screw hole in the fin box channel.
Board Models: Xplorer 14' (sold before spring 2014)