Do you use the felt washers under your tailpiece, or not? Why? Wondering if they have a muting effect. Just put on a high-dollar set of Flexocores, in search of something that doesn't crap out like Helicore; sounds like my bass is playing in another room down the hall instead of right under my nose. E string THE WORST, about half the volume of the others - just went to look up some info and found Ken's sticky about the stark E. Ugh, I guess I'll be buying a $60 single string, or else the Helicore goes back on.