Anti-Vibration Technology

[tonyfoale]

Like it? Same effect by hollowing out a boring bar [even shopmade] somewhat [a tapered hole is even better] then drill and tap end for big set screw or pipe plug. Fill with small lead shot [not molten] and thin grease.

I have several large boring bars that I made from thick wall steel tube which are filled with lead. That is, poured in when molten. This gives more mass than lead balls.
It would be interesting to compare results with your lead shot and grease. Lead does not resonate.