I've got a 73 precision bass that I have a bit of a problem with. When I pluck the E with any sort of force, it clips and sounds unclear. All fretted notes are perfect and it is not a problem with any ther string. It's not a problem when I play pick style, and it's really frustrating. I've tried lowering the pickup on the e-side, but if I go too low I have nowhere to anchor my thumb. Any suggestions?