There have been several operators over the years try to introduce the CSD here. Most, I’d judge, had not taken your course. A few have and the difference is amazing. It seems like some have nothing more than a list of ingredients, even if they claim to be Chicago expats.
I wish more operators would take the course. Right now I can only think of one place that has done them right and I think they’ve changed ownership since I was last there for a dog. The pizzas have gone way down hill.