I wouldn't suggest detuning them. Some people detune underfoot but I don't even do that. Normal wear and tear from just skiing will detune it but you don't want to detune your tip and tail
well u really don't detune ur tips and tails its not a good idea, after shapening your edges take a diamond or a stone file to the tip and tails, but lightly u don't need to do it too much. that should do it