I made this for my ender3v2 but i can clip to any 20x20 extrustion via the clips.

This model is intended to be printed on it's side, with 0 top and bottom walls, with about 10% infill, I printed it with honeycomb infill and I think it looks cool :))  

The tolerances on the dovetails are 0.1mm, they should not be too bad but be careful with the elephant's foot compensation, otherwise this might be hard to assamble. (external perimeters first also help a lot, if they still don't go together lower the extrusion multipier a bit)

I can upload more .stl files with higher tolerances if need be.