Would it be possible to run a jumper wire at the switch and have the bridge & neck pickups on the same tone knob? Effectively giving you independent control of all 3 pickups in otherwise standard wiring configuration? If I'm thinking about this correctly, the fact that you never have neck & bridge on together means you would always have separate tone control over whatever 2 pickups are on. Would that work? What would you jumper? I tried to search and see if this had been covered but didn't find anything. Thanks!