Donny FL tuning

Thinking my Donny FL Sumo might benefit from some additional material in the tube, and see it mentioned on AoA product description: 

  • Customizable, you can further dampen the sound by wrapping the interior tube with different sound absorbing materials.

What materials are you applying, how, and is it worth the effort ? I was thinking 3 & 1 oil and 90 weight ball bearings, but the bearings are hard to find.

Thanks !
 
MG616 So this is what a Sumo looks like inside.. Not much space for much of anything.

20210528_144822.1622228588.jpg
20210528_144916.1622228588.jpg
20210528_144903.1622228589.jpg

 
An old trick in sound dampening technology is the use of gels. Lithium grease was once commonly used in suppressors. In manufacturing, sound-absorbing polymers are used in many building products.

Think of it as throwing a ball against a wall if the wall absorbs the impact with little to no vibration. The sound is absorbed, and the ball drops rather than bounces.