Leo69, it’s probably obvious I’m in your boat. I want to build everything I can. I have a bunch of old CPU heatsinks, and I own a mill 😉 So I think I might make an overkill heatsink and grab one of those lasers or maybe one of there giant 6W puppies! I see some of the lasers that come with the drivers take 6-9v are you using a separate power supply or is there a 12v driver? And since you have become one of our resident laser experts….do you know if those stronger diodes can handle a long enough duty cycle to etch with?