Definitely no plate.
Personally I don't think you should move the binding back. The ski has a 19m radius and you don't want them getting sluggish. Stick with the specs, in my opinion, so that it works well in all conditions.
I used a 0.5 base angle because of the ski width. When a ski is that wide, especially compared to a race ski, it takes more work to get it tipped to the point where the edges engage and it turns. It doesn't take much leg movement to roll a race ski onto it's edge, but you'll find a 94mm ski is very slow to respond. The 0.5 base edge will provide a bit of help with with the response and you will probably be happier with it if you're stepping over from race skis, like I was. At those angles, I don't find them grabby in the least, but they react much better to input.
They come with 1.0 on the base, so to make things easier you can go to 3 on the side first and see how you like them before going to the extra effort to reset the base angle. I believe they come from the factory with a 1/1 tune, which probably works well in the park but not so great if you're doing real skiing on them.