I really liked stevenfayers design but I wanted the "melted look" so I remodelled them in Fusion 360. Whilst slicing the Y-axis damper, I had second thoughts and went back and redesigned both parts with a hollow centre to reduce the print time and the amount of material used.
Until now I never realised how expensive squash balls are!!
I used 4 off M4x8mm cap head screws per foot.
Raquette ball version added for test fitting (work in progress).