Posted by Tubaman with a Plan on April 03, 2001 at 20:02:22:
It was so amazing.  I put lead golfers tape in my instrument and now it sounds like a 6/4 top brand instrument.  I also added the tape around my mouthpiece.  The improvement was amazing.
This technique was taught to me by a pro who plays a Hirshbrunner.  His horn is full of lead tape.
If I can put lead tape on a $2200 Russian tuba and then go out and win the local audition, think of what you can do with your high dollar instrument.  The improvement of the new century.   
E-mail me if you would like the perfect configuration for lead tape strip placement.
Thanks