Even I don't split hairs on .5 degrees of side edge bevel?
You actually have a 3.5 degree side edge beveler? 4 is better anyway. My slaloms are .5/4.
If you are looking for more grip what could possibly be the advantage of a 3.5 over a 4.
I use .5/3.5 for SL, and have GS skis with .5 and 1 base bevels and 3 sides. I have the .5 on softer skis for turnier courses. I use a 1/3 on the long stiff skis I use for my one SG a year. For powder, I use 1 and 2. There is WC test data on the Edgewise web site on what base bevels work best based on the steepness of the hill which I read as indicating that .75 is probably best for carving skis assuming that you don't have a gigantic quiver. Obviously, I am not of the school that thinks 1 set up is best for everything.