I did modify my Wildwood banjo by removing the factory installed Waverly tailpiece and substituting a No-Knot tail piece. That added a little depth to the sound. The banjo is still pretty bright, however. I have had the neck scooped out from about the seventeenth fret toward the rim, thus making it easier to play over the neck. That fattens the tone quite a lot, and adds a funky clop, clop, clop sound on the brush stroke.

I have toyed with the idea of taking out the Tubaphone tone ring, and having a wooden one made and inserted there. I have also thought of just bagging the whole idea, and learning to live with the brightness of that instrument.
Jim