They are always quick to respond over there. I got the same response about the heritage
The Heritage is also directional, but has symmetrical sidecuts and flex patterns, making it able to be ridden like a twin if the bindings are slightly set forward on the board.
Yeah, they are quick to respond - just wish that they were clearer what they mean by 'symmetrical'/more accurate. Like the SL the Heritage (and the Legacy, and the Cobra,...) the sidecut itself is symmetrical, but the board itself is not (even disregarding the binding position) - because the sidecut is setback.
Consequently, unlike the Proto these boards do not
become true twins when the bindings are centered on the board.