During my daily search on YouTube I came across this video of a young lady being given a lesson on the bag, which she was doing quite well on. What really piqued my interest was the platform, or more specifically it's frame. It looks like it was built by an iron worker used to working on bridges. No vibration there!
https://www.youtube.com/watch?v=8XCddImkqy4
https://www.youtube.com/watch?v=8XCddImkqy4
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