I have been installing the new Protocrafts on various cars now. The Protocraft boxes are beautiful but will not use the stock mounting holes on Atlas cars. they stick out about 3/16 of and inch or so. You must drill new hole or use the Protocraft couplers in Atlas boxes. The short Kadee boxes can work if you cut off the rear stem of the Protocraft coupler. I have done this to my engines and cabooses because those holes are already set up for the short Kadee box. I cut off the back stem and fill the box with black RTV because I don't need them to move side to side on the radius I am running. The standard Kadee hole placement is about half a hole different from the Protocraft box. I asked Norm about this and he said he could not and would change it due to tooling cost. He also said I was the first guy to complain about it. I think these couplers have been primarily used in the brass arena where you are drilling your own holes anyways a lot of the time. Intermountain cars take a slight trim of the center frame and again an elongation of the rear hole and you can use the Protocraft box. I don't tap them I use through bolts with nuts on the back. Most of my PFE cars are Intermountain so I am fine with that.
Norm says they will not work with Kadees but I believe he means the operation side of the equation as they seem to hook together by the 5 finger switcher method. I made 2 transition reefers just in case.
I cannot post pictures, but if Erik comes up he can post the various modifications I did with his phone.
