I've had my Signature Deluxe 5-er for several years, been playing it exclusively, and always noticed a very slight buzzing on the E string when playing that F note. While lemon oiling the neck last night, with all the strings off, I decided to try raising the nut JUST a HAIR on the bass side only. What a difference! Clean as a whistle notes on the E string, and now it smells good, too! (Lemon Oil, remember?) What a bass...!