I found a product on Temu that I wanted to have. I thought I would design it myself. It is a casting mold that is fully scalable to my needs. It requires little filament. The dimensions of the wall are 50x50 mm or 5x5 cm or about 2 inches by 2 inches. They can be connected with paper clips. Stick to the substrate with double-sided tape.
The author marked this model as their own original creation.