I saw a tank in a video with machined stainless steel end caps with a thumb screw fill hole in the top end cap of the tank. It peeked my interest and I've been looking for a couple days but I can't find this tank. They said who makes it in the video but I can't remember who it was or the title or the location of the video. I wasn't really looking for a tank at the time so I didn't take note of the info. Has anyone else seen a tank like this and know who makes it or where to buy it?