"Detuning" to 1 degree base bevel is not what you would be doing. You would not be "detuning". You would just be increasing the base bevel! detuning connotates dulling or being less sharp. This is not the case when increasing your base bevel. This would have nothing to do with sharpness.
Be carefull with less base bevel. It can make your skis much more demanding as it reduces the amount your skis will slip versus carve. Your skis will roll onto edge more abruptly.
their was recently an article in Ski Racing magazine. They did an experiment with smae skier on different pitches only changing base bevel.
.5 was fastest on steep pitches, .75 was fastest on medium pitches and 1 degree was fastest on mild pitches. Maybe .75 is the way to go. A happy medium.
All of our Atomics from Downhills and Super G's to SL11, R11, SX11, GSX, GS11 and Sugar Daddy's and everything in between are 1 degree base and 3 degree side edge. They ski perfectly!
anyway, I think you need to try some different tunes always starting with less bevel and increasing bevels to see what works best for you!
Over & out!