For years, I didn't. I just did a base bevel instead.
But late last season I realized two things:
* My F2 183 feels amazingly neutral when riding with the base flat.
* I like that a lot.
* (Here's the shocker) The board was detuned.
* It's still my favorite board for high speed carving on uncrowded days.
I took it in 3-4 years ago, shortly after I bought it, and asked for a base bevel. I was delighted with the results... Turns out the shop detuned it at the same time. All this time, I thought it was just the bevel that made it so neutral.
That board is one of the best-carving boards I've tried, and after not riding it for a long time (due to having so much fun on my new Donek AX (1/1 bevel, no detuning)), I realized that I really, really like the way my F2 feels when it's not on edge. So I took a file to my AX. Got one day on it, filed a little more, and the season ended. Will be paying very close attention to this when the lifts open for this season.
I have a strong suspicion that the first time I took a board in and asked for a base bevel, it also got detuned. I may have been on the "don't bother detuning" bandwagon for a long time for the wrong reason. :lol: