I recently paid for a tune where they detuned my edges. I was really worried but normally there is plenty of edge left. I just ran my tuner 20 to 30 times (Ouch). Now the edges are sharp as hell just like I like em. I would suggest you stick with the sharp edges. They will dull slightly as you ride. Also, it will make you a better rider keeping your lead edge off the snow. Another option would be to bring your file with you and detune on the mountain.