perfect fit for 2020/2040 Extrusion (Openbuild/Ratrig) BearFrame Cover / Cable Channel.
haven't found any that would actually fit snug, so i made one myself.
it fits perfectly, is flush to the surface and has about 3mm room behind it to route any cables along the extrusion. just insert it, you have to press down really hard, but once its in you can move it with a little bit of force.
.step file only. just extrude the sketch for the lenght you need!
The author hasn't provided the model origin yet.