Darned those steam locomotive pilot couplers!

[modelsof1900]

Here my solution yet for a movable Kadee coupler in front of my NH rail coach - however, very similar to written solutions before.



The pivot point is a short wire set direct befor the front plate of coupler guide - here not good visible behind the coupler rod.



On backside I glued a wire formed to an eye bolt in a hole of shortened shank and then I added a spring for centering the movable coupler.
The spring could be a shorter one or this can be a small flat spring that is set behind a rectangular shortened end of shank. I think that there are many solutions for centering the coupler.