That video is 5 years old. I wonder if anything has been created from it?
Hopefully a trigger and a handle were added.The thing looks simple as hell to build as is.I like the slow mo closeups.
Although looking at the ghost drawing of how it is fed makes it hard to imagine a way to put a trigger on the thing. It's designed for a non stop straight run as soon as it is activated.
Some years back there was a .22 that fed from from a massive drum. It was a regular bullet hose. Sounded more like a saw on steroids than a gun.
Opinions are like assholes, everyone has one, some peoples stink more than others too. Remember, I can make your opinion disappear, you keep the stink.