I know that a lot of makers like to create their own PCB at home and about a year ago we made a video showing how to make a PCB just using laser, film and FeCl3 with water https://www.youtube.com/watch?v=Q39atHpMnfo But we still wanted to give a better tool and finally we tuned 5.6W laser and installed on a Neje engraving machine (just as a good mount machine). And it appeared that with a help of 5.6W diode laser you can do laser soldering. So it is quite easy, just press a button, wait for 1-2 sec and it is ready. https://www.youtube.com/watch?v=5XXsWwHJqkA
Nice video, that is exactly the reason I bought my laser cutter, using the exact same method pretty much.