Got a Fender P-Lyte and I want to replace the tone knobs. They still have the cheesy strat style fender cheapo's on em' and I can't find the spec's for the size to replace them with. Being that I don't see a tension screw anywhere I am guessing they are the push style??? I's like to replace them with some stock Fender P-knobs...this possible? Anyone know exactly what size these stock knobs are?