GMC Canyon Chevrolet Colorado JBL GTO629 rear speaker mount bracket - OpenSCAD

Mounting bracket to mount JBL GTO 629 6.5" Speakers in a 2004 GMC Canyon (or similar year/model). I used two of the JBL provided screws per bracket to mount the bottom of the bracket (optionally along with a #8 washer per screw), and four #6-32 x 1/2" machine screws to mount the speaker to the bracket. An optional small 4" zip-tie can be used to secure the harness to the back block. A foam ring can optionally be added to help seal the speaker to the door panel. The Metra speaker harness is also optional, but allows installation without cutting of the factory connection. The foam tape seen added to the bracket was provided by JBL with the speakers. Bill of Materials: * JBL GTO629 6.5-Inch Speaker (Set of 2): https://smile.amazon.com/JBL-Premium-6-5-Inch-Co-Axial-Speaker/dp/B07S9L5S55 * Speaker Foam Ring (4-pack, 1 needed per speaker): https://smile.amazon.com/dp/B08BZ887WB * Metra 72-4568 Speaker Harness (2-pack, 1 needed per speaker): https://smile.amazon.com/dp/B0002BEUZ8 * 6-32 x 1/2 in. Combo Round Head Zinc Plated Machine Screw (8-Pack, 4 needed per speaker): https://www.homedepot.com/p/6-32-x-1-2-in-Combo-Round-Head-Zinc-Plated-Machine-Screw-8-Pack-803021/204274603 * Zinc #8 Flat Washer (30-Pack, 2 needed per speaker): https://www.homedepot.com/p/Everbilt-8-Zinc-Flat-Washer-30-Pack-802461/204276449