By the way, I would warn against centering your stance on a board with a setback. Unless of course the sidecut isn't centered around the setback stance (it normally is). I'm not sure if the SL has a centered sidecut with a setback stance. By all accounts though, the SL only has a slight setback so you really don't even need to center it.
Exactly that. Most people have no idea how the stance position/setback relates to the sidecut (as opposed to just the position along the length of the board). An SL does not become a true twin simply by slapping the bindings on the board without setback.
Don't even get me started on flex...