Wardrobe pantograph pull down hanging rail

I marked the part with red on one of the pics. So the thing is my wife broke it some time ago.

What I did is I copied the design of the original part and printed it vertically (T shape) because it's harder to print cylinders horizontally.

It worked well for a while but then my wife broke it again...

I figured out the reason - If the part is printed vertically, it is not strong enough (due to layer positioning being opposite to the direction of force typically applied during regular use). So I oriented the part horizontally, but got failed print...

And then I got an insight - Why the hell I'm copying the exact model with exact cylindrical shape?! ... Perhaps it makes sense for manufacturer which uses plastic molding techniques.

So I rebuild it in square shape and while doing so I enhanced the mechanism with extra functionality which allows users for some lateral pulling movement (as you can see on the animation)

In order to assemble the part you would need to use a