Customizable drawer organizer Bracket

I wanted to be able to customize the gap in the drawer organizers to mix and match materials or attach the brackets to the drawer sides.

So I built a version from ground up in OpenSCAD. This is just the 90 degree elbow but it can be used in right or left orientation. The other versions will be coming soon.

I haven't been able to figure out how to effectively taper the walls like in the original design. So if any OpenSCAD master has some tips, I'm all ears. Also, as this is my first project meant to use customizer, I apologize for any issues you may experience.

Edit:01 New OpenSCAD file added. v05 now has tapered panels, but the intersection of the two tapering panels is not quite clean. I still need some help figuring out how to combine two panels cleanly.

Edit 02: Added new file that has options to create 3 way and 4 way connectors.