Here's a little video displaying the Schluter drain and assembly we use for our new showers.  We set the assembly in a wet bed of dry pack and we then begin sloping our pan. A 1/4" of slope per foot is standard. Now to clarify, we do not use foam pans. We custom pack all of our shower pans because when you have the knowledge and the ability, why wouldn't you? It's really been a great couple of weeks.