iacas,  After reviewing some more practice swings your absolutely right about the club face. It was WIDE open 🤣

1mm is huge. The paint is a fraction of that.

Golfworks.com has guides to the different shafts they stock, including weight. But I agree with @bladeputter_11, weight is only one criteria. I moved away from light shafts because I could not control them as much.

Day 350 Superspeed workout. 

Last weekend when it first happened I shoved a fingernail in to see what was going on. The cracked sections are probably 1 mm thick, which makes me think that it is structural. I have a back up shaft that I am playing with tomorrow morning, and hoping to see some distance and proper ball flight come back. Will report back tomorrow, whether I am still short, or come back to 2/3 of tour distance lol.