I purchased a D1 pro 10w in February of 2024 and I thought it was working well enough. This is my first laser. In late May, it stopped burning and after trouble shooting using all the online forums, I reached out to xtool customer support who made me do all the same steps 2 more times an then once more with video confirmation. Anyway, I had to send my laser head to some guy name Damien (with no last name) and then he sent me back a different laser head.  When I received the new laser head, it took me 13 minutes to be up and running but this new head burns far better than my original one did when it was new. What used to take 4-5 passes at 5400 mm/m with 100% power, I can now do with 2 passes at 6000mm/m and 100% power. I am wondering if anyone else has had this experience. I have to assume that my original laser came from the factory a little “weak”.