I spent a lot of time testing out the PS200. The best finget arrangement I found for a hand tossed pizza was all open on the bottom, and (from the entrance) 2 open, one closed and an all open at the end. I have a Japanese version of the ps200, and I use that same finger placement.
I did spend a week in the factory testing different set ups, and found that to be the best bake I could get.
With the shorter baking chamber on the ps200, cheese was not done nearly enough with 3 closed fingers and one open on the top, so all closed on the top might leave you with a raw pizza(with cooked dough though).
One other thing, if you take out the 2 middle fingers and stop the belt, you can cook a decent sized turkey in that oven.