Lego 9.5L Shock Absorber Hardness Adjuster

This is an idea I came up with while working on a Lego Technic model that really needed 8x 9.5L extra hard shock absorbers, but I only had 4. It struck me that I could easily 3D print a spacer that would clip onto the body of a soft 9.5L shock absorber to harden it up, so I quickly modeled and printed some! They seem to work quite nicely, essentially doubling the stiffness of the soft shocks, though they're still slightly softer than the extra hard ones. They can also be clipped onto the extra hard shocks to make them even harder, and the height can be adjusted to adjust the change to hardness. You can't go any harder on the soft shocks before the coils start hitting each other, but a slightly taller one could get the extra hard ones to be even harder still!