Go to the Tulane University library and check out the simplex collection there. It is free and open to the public. It is from Gary Wollards collection donated to the library by his family. It has a collection of advertisements, documents and blueprints. As I was viewing the blueprints I thought to myself that Treen himself had this in his hand and gave the approval for the part to be manufactured, it was pretty cool. Lots of cool history so the next time you visit I would highly recommend you check it out.