What John J said. I would adjust to taste. Still it's nice to know how Rosi thought they should be tuned to work the way they were designed to. Sorry I can't help you there.
I'm thinking a B3 is a soft-snow ski so the edge and base angle will not be as critical as when skiing on ice and hardpack.
For what it's worth, I experimented with 0.5 and 1 degree base (on other skis), I find that I prefer the 0.5 base, it just grabs on with a little more immediacy. I like a ski that does what it's told to do, and you don't have to be so loud in your commands to the ski so to speak. At 1 degree I found the edges would release easier for doing thins like spinning around, skiing sideways and backwards on the hardpack while watching the wife or the kids. As for edge bevel, It's just a question of grip. 2 degrees seems to be ok. 3 digs in better.