When Idler Drive Damping become a buzz topic, Squash Balls and Half Squash Balls become a regular used footer, as well as a concealed part in some of the Commercial available Plinths.
What was learned as time went on, was that a spent of its energy Squash Ball was for many DIYers chosen as the better option, it is worthwhile visiting a local squash court and seeing if a batch of spent balls can be picked up.
These can be used as a comparison to a new squash ball, and will again be a much cheaper option that going immediately for something like the Ginko Cloud, which is seemingly using a version of a method that had popularity in the 90's and 00's.