Been working on a project that is an adapter for American Models trucks for Kadee couplers to allow a quick change from Claw type to Kadee type couplers without mounting the box on the car frame.
This may be handy for club layout visits or for a easy way to use more scale type couplers on AF and AM rolling stock without modifying the rolling stock. I have designed a 3D print version for prototyping. It can be tweaked for various lengths.
What do you think?