Curtain Glider (IKEA compatible)

So when installing another set of curtains, we noticed that we ran out of curtain gliders. As the object looks pretty simple, it should be fairly easy to design in blender. The wheels don't actually turn, but the surface area is very small, so it will turn out not to cause any friction and indeed move well.
With a few iterations, I put it to my 3D printer and the gliders came out sturdy and of quality.
They fit perfectly and work quite well — and that’s all there is to it! -> See in action: https://www.youtube.com/shorts/Ugn33__1Jnc