When you live, like me, far from the US and american hobbie stores, you have to adapt.
Its the smallest model I've made but since its really hard and expensive to get the standard Kadee #5 coupler here, the Alx coupler fills a gap.
Print it with a 0.25mm nozzle and use 4x2x1 neodym magnets.
The magnets have to be inserted 2x2 with opposite polarity in the holes.
No glue is needed, just push them in.
The author remixed this model.
Made in H0 scale and for use with US rail cars.