VESA mounts for Pretty much any screen out there, if you want to use 3/4" pipe as the base support. Have to tap the holes by hand, do not use a drill, slow and steady and back out every couple of turns to clear chips. Using a drill causes too much heat and will not give you the proper strength.
My kid wanted Red.
Use at your own risk. I did design the structure to support up to 50#, but I do not want to claim responsibility for your TV's/Monitors.
Edit 4/5/2019 Uploaded the FreeCad files per request
3D Solutech PLA
At least 4 walls and 4 Top and Bottom layers. Tap holes by Hand. Uses M3 hardware. PLA worked for me, but I have been told Petg would be better. Either way, use at your own risk. The 40" TV is older and heavy, but still going strong for over a month.