what brand pickups are they ?
F spacing is more an aesthetic choice than a sonic necessity - magnetic fields don't just rise vertically from the poles. Standard spaced pups sound just fine on guitars like the 570. The only advantage of f spacing that I can think of is that you can get more wire on the bobbin due to it being slightly bigger.jra2217 said:the tone zone is mostly used as a bridge position pickup. If it is going in an rg 570 you need the pickup to be f-spaced.