A sorting system I created for my shed to hold all kinds of small long material. The model can be extended with as many pipes as you want.
For the mounting you have to use 30mm M3 cylindrical head screws.
Used PLA to print and placed some support with support enforcers on the connection point. I is not necessary to place supports from all positions on the build plate. See the example slicer model to see how I placed the supports. A little bit of sanding to remove support part to make all connection points to fit nicely might be required.
The author marked this model as their own original creation.