Ahh, gotcha… there are indeed 2 versions though, with and without the shelf, but those without are really old.
I likewise did not like the Aristo couplers, besides the problem you mention, I also had them let go on long trains.
Aristo did a landmark business in replacement couplers, and that tells a story… I remember all the posts on the Aristo forum when the big bag of them was out of stock. Since all the faithful already had Aristo couplers, they had to be replacements.
Another thing I did not like was the “shelf”. While it was very popular with most people, in that it prevented uncoupling because you could not override couplers. For many people this was a boon since trains held together very well even if coupler heights were all over the map. Because virtually all the Aristo stuff was truck mount, coupler heights were crazy, especially things like the heavyweights where not only did the coupler height vary because of truck mounts, but off center mounting to chassis.
But, in my case, when I had a derailment, and a car fell over, it took the entire string of cars in a domino-like slow ballet move.
I found the USAT couplers less reliable due to the metal pin and my proximity to the ocean, they rusted and jammed up very quickly.
As you can guess, I’m all Kadee, except for the USAT tight-lock couplers on their streamliners, wonderful all metal cast couplers.
Greg