I just bought a Modern Player Thinline with P90s. The only thing I'm going to consider changing - purely cosmetic - is the black plastic pickup covers (I have the sunburst with parchment pickguard). Will fitting chrome plated nickel covers alter the sound? If 'yes' please expand. I could get chrome coloured plastic ones, but if I'm stuck with plastic I'd rather go for ivory, rather than have pretend metal ones. Thanks!