I was just pondering why CWB seems to be the only company that does not put more than one bolt on every fin for every board. ( some exceptions being the vibe and kink)
most of the CWB boards use the center bolt with the two nubs that go into two shallow holes on the underside of the board.
some (possible) reasons i thought of:
quicker to bolt/unbolt
if a fin catches on a slider real bad it can break off easier with less damage to the board?
for the cons, it seems it would be less secure and require re-checking of tightness often... but this is going of experiences with my first couple of boards when nearly all boards were this way. i bet things are more precise now. but back then i also had not discovered lock-tight yet