Tom,
To begin, I suggest that you let your dough temper at room temperature for more than 1/2 hour before shaping and stretching into a skin. When I made an early version of the Raquel dough formulation, I used the original Raquel recipe given at Reply 24 at
http://www.pizzamaking.com/forum/index.php/topic,1258.msg11359.html#msg11359. The instructions for that recipe say to bring the dough to room temperature. Did you use the same version of the Raquel recipe? Either way, unless you have a very hot or very cold kitchen, I would shoot for a temperature for the dough of around 65 degrees F before shaping and forming into a skin.
In general, I think that the Raquel dough formulation does best with a higher oven temperature than a standard home oven can deliver. However, I think you should still be able to make a decent Raquel pizza in a standard home oven. I personally made two versions of the Raquel recipe using my home oven--one using a natural preferment with a small amount of commercial yeast (IDY), and a second one using only commercial yeast (IDY). I also used some oil in the dough. I described my results for the preferment/IDY Raquel pizza at Reply 198 at
http://www.pizzamaking.com/forum/index.php/topic,1258.msg20961.html#msg20961. I described the results of the Raquel pizza using only IDY at Reply 212 at
http://www.pizzamaking.com/forum/index.php/topic,1258.msg23092.html#msg23092. As you will see from those two posts, I personally preferred the pizza using the combination of the natural preferment and the small amount of IDY. It is possible to use a poolish in lieu of a natural starter, but the basic Raquel dough formulation you used would have to be reformatted for that application.
When I made the two Raquel pizzas referenced above, I used a combination of screen and pizza stone. Once the pizza baked for a while on the screen (which is bigger than my stone, as in your case), I shifted it off of the screen onto the preheated pizza stone. You didn't specifically say whether you did something similar, but I did not place the screen with the pizza on it onto the stone. In my case, I also used the broiler element but it may well be that I could have just used the top oven heat for the same purpose, which is the standard method I now use for the most part when using high protein flours.
Peter