This is a stackable shelf for HxWxD 80x150x200 with 5mm clearance. This shelf can be fully 3D printed but will require M3x8 countersunk screws to assemble the rear brace and super glue to assemble the top/btm braces. I did remove some of the features on the rear brace support since I took the photo, so don't be surprised by that.

Youtube Short assembly Video https://youtube.com/shorts/drxw0sZkVNQ?feature=share

If you want this as a fully adjustable parametric model in Fusion360, you can join me on Patreon to help support my work! https://patreon.com/DesktopInventions?utm_medium=unknown&utm_source=join_link&utm_campaign=creatorshare_creator&utm_content=copyLink

For each Layer you will need:

Left side @1 Right side @1 Top/Btm Brace @2 Rear Brace @1 M3x8 countersunk screws @4