LG SJ6B Soundbar Tilted Wall Mount

I wanted to mount my new soundbar (LG SJ6B) on a ceiling beam, but the mounting hardware it came with only allowed for a 90° mounting angle (and it was an ugly raw metal color that would be an eyesore when looking up at it from below). Based on my ceiling and viewing area distances/angles, I needed something closer to a 116° angle.

I modeled this in SketchUp with plans to print on black ABS for strength, but the test print in PLA with 50% turned out to be more than strong-enough to work.