do it however you feel comfortable... It is hard to tell people how to do a trick one certain way. Everyone has their own opinions and ideas about what feels right. If you like surf stance, go surf stance, if you like em back, leave both feet back... Just dont be close minded to new options. jump on a buddies ski (with their permission of course) with a front foothold/strap and try to throw a stab or two in a different stance and see how it feels.
live - n - learn