I've always struggled with setting bindings back in a way the board isn't designed for. Tried it a few times and hated it, and really haven't done it since. Now I just keep a board in the quiver that excels at pow whether pow-specific or just one with great float.
16 NS West . 15 NS Snowtrooper BIA . 13 Salomon Pow Snake
15 Now Drive . 14 Burton Genesis
14 Flow Hylite