I have a small and simple plug in PCB board from a power supply on its way to me, inside a partially working PSU. It is the same board that is missing altogether from a sister none working supply I have, that gives a hefty 60 volts, 50 amps variable output that I want to fix. I could de solder and remove all the components off the board I am getting, and thought I could maybe take some sort of "brass rubbing" tracing of the tracks, but is there a better way? I would like to try and etch a board myself but have never tried anything more than very basic stuff of my own design, with the tracks blanked of with cut vinyl tape, or marker pen. Thanks.