Has anyone here done an external PSU before?
-Is a computer harness any different then a cars computer harness? I'm asking because if I cant get a longer harness I was thinking about just purchasing a PSU and extending it myself. I can wire cars,would it be any different?
That would work just fine, I have done similar projects where I slapped in a second PSU to handle additional load simply because I was too cheap to purchase a newer unit when I had ones laying around that worked just fine
In both cases I just tied the grounds together all the hot + leads were independent, one would power up the board and the other would power the components. Since you are doing a direct PSU replacement just make sure the wiring matches and you won't go wrong.