Zipper testing machine.
<video controls autoplay loop>
<source src="https://diqn32j8nouaz.cloudfront.net/zipper_testing_machine.mp4" type="video/mp4">
Your browser does not support the video tag.
</video>
Previously:
https://www.homemadetools.net/forum/...689#post136658
https://www.homemadetools.net/forum/...703#post139898
