Dolby Atmos Speaker Mount

I've been using some bent metal for years to position the speakers I use as my up firing Dolby Atmos brackets. I got tired of looking at them yesterday and whipped up these base brackets to hold my speakers upwards so that they bounce off the ceiling. These speakers and brackets sit on top of my floor standing front speakers. To use ceiling bounce Atmos speakers there is some geometry normally used to find the proper angle to point them up based on starting height from the floor, distance to the seating area and ceiling height in the room for starters. For me that was ~28.x degrees from my originals but in the effort to make my life simple I rounded up to 30 degrees for these. Atmos provides fill sound and more of a spatial presence so I don't think the <2 degree change will make a whole heck of a big difference.

I am also including my Fusion 360 file in case someone would like to edit and change the angle etc.