I need to remove the plastic on the pickguard from this guitar. I kept it on for years because I was thinking of selling but I have decided to keep it. The only problem is the plastic is starting to fall off so I need to remove. I see that there are screws on the amp knobs on this guitar? Do the screws loosen then just slide off? It doesn't appear to be the same as a standard Stratocaster knob. Anyone know for sure how to remove them?