Everett Spells, local sax player & teacher brought his Selmer Mark VII Tenor in for a neck cork replacement and some tweaking. It had lots of rattles and clanks(as most horns develop over time). Some felt, some cork, some oil, and some heat shrink and it’s much much quieter now. I also had to adjust a few keys/pads, but nothing major. Don’t let appearances deceive you, this horn really blows! (<<<in the good kind of way!)