Reply to "My first Kadee project?"

I would suggest ordering a few different couplers, 805, 740, 746. With those thick diaphragms you will most likely need 746s, the long shank, and even then... they may not be quite long enough. Freight cars are easy, passenger cars not so much. There isn't just 1 set way to do passenger cars and get them to stay on the track in the curves. You may even need to modify the draft gear boxes as I show in my Kadee video Part 3. Close coupling is 1 thing, this diaphragms add another element, especially if they are stiff, or don't compress much. You will have to experiment for sure.