Fair enough. I would recommend a fast blow low value fuse in line and pay particular attention to the mechanical reliability of any solder joints. Murphy was an optimist.I agree about the power but I don't use it for any significant amperage. For my big LED light it has it's own battery. I may swap out the phono connector. I planned the remote trigger to be the small RCA and the reason the power is the 3.5mm RCA is simply because it was what I had on hand at the time. The power jack was actually an total afterthought I did at the last minute. My main project was making the accessory trigger. Then I figured why not have a little power jack in case I need it for something small. I have thought of using a barrel connector too but I really don't use the power one much.