Hi, I have a Yamaha RGX420, 6 string ,2 Humbucker pickups, 5 way selector switch and a bypass switch (for lead setting - double coil neck pickup). The 5 way selector configuration runs as 1st- double coil bridge pickup, 2nd- single coil bridge pickup, 3rd- double coil both bridge & neck, 4th- single coil neck pickup, 5th- double coil neck pickup. I'd like to ask if the 2nd selector can be modded to a - single coil both neck & bridge pickup? and probably how much would it cost? thanks....