Yes, running the cars I noticed the pivots of the actual couplers are locked. they do not swivel about their pivots.
Thus when the cars are motioned fore and aft they ride onto this V slot that looks very awkward. If the V slot was cut away will this "Monkey Motion" of the coupler be avoided?
And I believe using the 746 Kadee and mounting them back 1/4 inch on the car floor will eliminate this John.
I am going to mount these and throw the rest of the "poop droop dumb tacks" in the garbage...