A border I created using Xander's OpenSCAD file for my HSW.

Hopefully, it might save someone else the trouble of finding the best design.
 

It suits wall-honeycomb-k1-211x201.stl for 220x220 size bed such as my Ender 3 S1.
Print as many top, bottom or sides as required and 2 of each corner.
Use insert-for-countersunk-hole-3.stl for joining.
 

Thanks to RastaP for this awesome project.
Thanks to Xander for making it so easy to create these.