Green Screen PVC Frame Clip

I have a large DIY green screen behind my desk for videos and livestreaming. It is constructed out of 3/4 inch schedule 80 (i.e. grey electrical) PVC pipe.

Though it has a base that prevents it from falling over easily, it also has a bar along the top for mounting clamp lights. Small diameter PVC pipe is a bit bendy at any significant length (above about 1.5 - 2 feet), so the weight of the lights and the screen itself makes it tend to lean away from the wall.

I designed this to hold th