I could faff around and experiment but someone here will know the answer straight off. My Heritage has the long barrel type socket which is an awful contraption and stops you removing the pots easily. My preferred option is to fit a Les Paul type jack plate and an ordinary Switchcraft socket. Simple question: What size do I need to bore the hole out to?
Second question: I can't see any evidence of the bridge/strings being earthed. This guitar has been messed around around with but am I right in thinking there would have been a wire wedged in next to one of the tailpiece bushings? There's a messy repair job but I think there used to be a hole through to the control cavity.