Place your platesetter legs down like this.
Place spacers on top of the platesetter (I use four 1/2" nuts) to create a barrier between your platesetter and stone so that it is just a little above the gasket level.
Stabilize your BGE at 500* letting the pizza stone heat up with the egg. I build and bake all of my pizzas on parchment paper as it make it much easier to get them on and off the pizza peel. Mine go in for 12-13 minutes turning 180* at the half way point. Hope this helps.
Mike