Cool idea. I would be interested in knowing the concentration you achieve and flow rates (LPM/CFH). This wouldn't work in my workshop as we don't treat our equipment nicely enough and we don't have sparkies to tend to it.
I wonder how this performs compared to the cheap concentrators you can get off ebay.
Interesting, but why did the original poster link to part 2 of the thing?
accompanying video: https://www.youtube.com/watch?v=lB3hHk1_2V0&t=97s