Dolby Atmos up-firing universal speaker stand

After having some spare speakers around, I decided to use them as dolby atmos up-firing speakers, in order to test that functionality as well.

I have been using a public version of the stand, but figured out that the angle was not good for my living room. After doing some math, I figured that the best angle, based on the distance of my viewing position, is 55 degrees. If anyone else can position the speakers with a distance of 2,60 meters from the viewing position, and 2 meters from the speaker to the ceiling, can use this as is. You can get away with minor changes in distances, in order to experience the atmos effect.

Created a different angle for the speaker, to match in smaller spaces, and removed some walls for faster, lower cost print.