Forty years ago we had to read to learn anything. You know yourself once you get to a point you want to just do it and test. I shared all those Darren Morgan porting videos and never watch a single one. But yet I’ve done 20 plus flow tests in a day, made port molds, taken a notebook and pen to bed. I sleep like crap because I think all night about crap. I retired 13 years ago and I’m still doing millwright work in my sleep. Now if I question myself on a job I’ll watch a few YouTube videos and do it. Heck I take notes at church and rarely go back to them. I should but Dont. I bought a book on porting LS heads and read 1/3 if it to find out which ones to buy, and why.