Vibration isolation apparatus and methods of manufacture

A vibration isolation apparatus, comprising:

• a main spring having a first end and a second end, the main spring configured to resonate when vibrated within a predetermined frequency range with a first axial surge mode having a magnitude;
• and
• a first tuned mass damper coupled to the main spring at a first axial position located substantially equidistantly between the main spring first end and the main spring second end;
• a second tuned mass damper coupled to the main spring at the first axial position, the first and the second tuned mass dampers substantially equidistantly spaced around the main spring and configured to reduce the first axial surge mode magnitude to a second magnitude that is less than the first axial surge mode magnitude when the main spring is vibrated within the predetermined frequency range.