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The screws are for the moving dials. You can alternatively glue them on in a fixed position. This is a 3D printed physical DIY kit. Since this is a Do it Yourself kit it will require cleanup, assembly, filling, sanding, and paint.
When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.