I am trying to make this cube that has 4 open ends and 4 mitered ends and is made from mostly hollow tubes that are solid for 0.1" at each end, where the mitered joints are. My question is how do I fill up the hollowed parts of the mitered joints to make those parts solid. This is going to be a 3D printed part so the volume of this space has to be filled.
I can make this without using weldments, but this is good practice for me. Also all I need explained is this part. I attached the custom weldment template as well.