I didn't take any pictures because I don't know what to photograph exactly. It all started when I switched from the stock rounds on my MIM Precision to D'Addario Chromes (flats). I tweaked the truss rod according to the Fender website specifications (using correct size Allen wrench and feeler gauge). Then I lent my bass to a friend who needed a P for a gig and he said it sounds/feels great but the neck is twisted (?!). I didn't notice any buzz (except on the C on A string, but that's most likely due to a too high fret) so I never thought that would be possible. I looked from the headstock down to the body and I did notice that the E and A side of the neck is a bit taller than the D-G side (like the neck is VERY slightly tilted to the left). Is that the twist? I also noticed big fret buzz on the E string after the 12th fret (but no buzz on A-D-G). Does that mean that I have to replace the neck if I want to fix this problem? If I leave it as it is, would that grow to be a bigger problem in the future?