wall mounted auto rewind spool thing.

thingiverse

It's designed for flat installation on a wall and is more cost-effective to print. The design incorporates an 8mm screw bar with nuts and at least four 608 bearings, typically three. Printing requires only 100 grams of PLA or alternative materials like PETG; steel is not recommended due to its weight and potential for damaging the screw bar. The component intended for table attachment can be heavy but a hole in the table allows use of a few nuts with the screw bar passing through it. The "resorte finito" works correctly, although I haven't thoroughly tested the other one. Printing the spring is significantly easier than printing the original version; when using Cura, ensure that "Combing Mode" and "Fill Gaps Between Walls" are disabled for optimal results. It prints quickly with high-quality output, especially with supports only on the center hole. For assembly details, refer to the design online, where you'll find a crucial tubular component that fits inside the spring. This allows the spring to turn freely even if the outside spool holder is tightened firmly. Design Link: https://a360.co/2HAPV8s