Duplex Folder Stock & Brace Updates

V1.1: Duplex Folding Stock & Brace 2020 ConversionReplace "Arm" piece with 2020 Aluminum extrusion. V1.2: Duplex Folding Stock & Brace Push Release EditionAllow for faster folding to either side/ complete removal of stock arm. Update 01/10/2026, V1.25Added Arms with 15deg angle.Added Arm.25's, They have a chamfer added to the cutouts for added strength and to reduce support material.Modified Cheek Rest Knob to make it easier to print by filling the hole for a single layer. See readme