Very interesting. I enjoyed the video and can see where that tank could be of use. I don't know that my work-flow (when it exists) could take advantage of it, but it is nice to see such an option existed. I supposed if I had one roll I wanted to develop on a lazy day, that tank might be great as I'd not have to mess with a bag and other items. If doing more than one roll, I think it would be more efficient to pull out the changing bag and multi-reel tanks.