You’re welcome. It’s always gratifying to see people making the effort and not just sitting back and wanting to be spoon-fed.
Thats how I learned. It has paid off, handsomely.
And FYI, the most powerful diode laser made is ~6.5W, so you were ripped off with your ‘15W’ unit. It’s an over-volted 6W unit. You’ll be lucky if it lasts 200 hours.
Here, as I’m feeling generous:
https://github.com/gnea/grbl/wiki/Grbl-v1.1-Laser-Mode
Just as a pro tip, I typed ‘grbl laser’ into google and it was the first entry that presented itself.