Heyo! I have an Ibanez RG652FX that I'm changing the pickups on. I took some really quick measurements: Bridge pickup string spacing: 53mm (DEFINITELY F spaced) Neck pickup string spacing : 50mm (Standard spacing?) But I am looking for the Gravity Storm neck or PAF Joe neck. I cannot find them in regular spacing. Apparently I need to special order. How much does it matter having a regular vs F spaced in the neck position? Thanks!