Seriously! Nobody hits rails with their skis perfectly flat on them, and if you did you would catch an edge on every little chip, ding, and scratch. Another degree will not change the way it feels on anything other than carving, and it will make that more slippery. With rails, your edges are either sharp (no matter what degree) or dull and round. Dull and round slides nicely, and sharp (again, no matter what degree) likes to catch and be much more sketchy.