The couplers could be beginning to bend upward as you run the cars. The post fastened to the kinematic plate begins to bend under the weight of the cars. The passenger cars a much heavier than the Auto Carriers and 86' Box Cars. The passenger cars have a thick steel plate with detailed parts screwed to it.
All of my passenger car couplers are starting to bend upward. (SP and UP sets, and Amtrak Dining Car) The coupler is ripping the diaphragm off of my Amtrak Dining Car. Not good.
My first run C&O, NYC and Wabash cars all had the full-width Diaphragms that hid the fact that the couplers were bending upward. The couplers were held down by the Plastic Diaphragm floor of the Full Width Diaphragm.
My pictures are blurry because the train was moving in order to put a load on the couplers and get them to show their upward movement.
