I ride a twin and moved both bindings back one hole from the reference stance. It floats the pow, doesn't nosedive and turns in trees quicker. I have left it there for the PNW (BC).
The Bezerker already has a setback so don't go too crazy, one hole back on each binding to keep your stance. Or one hole back on the front if you want a narrower stance. It takes lots of leg muscles to ride pow.