There are plenty of straight forward 4 way wiring diagrams, easy enough to follow, but I have tele usa pro. It has a bit of a different setup - humbucker in the bridge with S1 coil spitting push volume knob and the typical single coil in the neck. It's the S1 switch the is giving me a bit of trepidation when attempting to wiring the new 4 way switch. I've yet find a diagram to follow. So, has anyone done this? Know of a diagram? or something similar that can help with the S1 and 4way switch? Appreciate the help.