I've been watching Robin's channel ever since Tom Lipton mentioned him on his channel David. An extremely talented person who's demonstrating a lot of topics that haven't been covered by others. There is a lot of really decent machining content showing up on Youtube by people who know there subject very well. Stefan Gotteswinter, Clickspring, Tom Lipton, Abom, This Old Tony just to name a few. I'd still have to put Robin right at the top of the one's I know about today. That's just my own opinion and others may think differently.