Sinking Chair Fix

I have an office chair that is comfortable, broke in, and the piston doesn't maintain the set height any longer and this solves that problem for me. Note that you can stack any combination of heights ¾", 1", 1.5", and 2" to achieve a comfortable chair height and take the load off the piston, or in the even the piston failed. Depending on what material you print these with (PLA, PETG, etc.) you may want to adjust the infill percent. I printed in PLA, and 30% seems strong enough.