Has anyone fitted one of these tubes to a k40? https://www.aliexpress.com/item/Co2-Glass-Laser-Tube-Metal-Head-700MM-40W-for-CO2-Laser-Engraving-Cutting-Machine/32780988059.html?spm=2114.13010208.99999999.262.O9QCvx Look quite good quality but unsure of the cathode-anode terminals
Quick update, I have been using this tube now for a couple of weeks, up to now it’s simply awesome. The build quality of the tube is the best i have seen in the sub £300 bracket. Hopefully it will keep running the way it has been. Next thing to fix is the poxy motherboard 