I'm about to change out the pups in my old Les Paul and I want to be sure if what I have will work. I have some very old Radio Shack .50 2 oz. 97/3 rosin core lead free. Will this work or what should I get? Thanks
Kester 63/37 is pretty much the state of the art. One note however. If you use lead free solder, be sure to remember that from now on. Should you give your guitar to someone to work on, be sure to let them know as well. In the event you add something or need to do some other soldering, lead free and leaded don't mix well. I can't imagine a situation where you'd need to mix solders on a fix, but it's worth noting nonetheless.