We have been kind of enjoying since we went down the very deeeeeep "Allice in Wonderland" hole of espresso machines and coffee. I put in a search for him and grinders. He is pretty entertaining and seems really knowlegable and practical. Well as much as a person can be liking espresso and coffee as much as he does. He is a little weird but so is the whole community.

https://www.youtube.com/results?search_query=james+hoffman+grinder

Edit: Beginners guide to coffee grinders.

https://www.youtube.com/watch?v=bgjvLQu5NlE&t=8s