[1saxman]

Plus, the standard brown nylon tone boosters are the lighter than the 'boutique' metal ones, which makes the horn a little lighter but mainly reduces the weight of the moving key assembly for faster action. As already said, they are of course non-corrosive which is another plus often overlooked. The original MK VI of 1954 had metal tone boosters but they were quickly replaced for many reasons with the brown plastic ones. On a recent overhaul of my '71 VI, I got the thicker roo pads with the brown plastic booster. On another overhaul of a Selmer USA tenor, I got the polished metal boosters because that's what it came with. The results were very satisfactory in both cases. I don't see any reason to 'doctor' a MK VI that's in good condition and playing properly - if you need more power, change your mouthpiece.