The rubber washers that holds the load is not an o-ring, it has flat faces. In the pic is already under the full spring compression and dont walk outside. nylon wont be usefull, it will require holding the screw with some tool while tightening, loosing a lot of the convenience of this setup.
I had plans of using stronger springs, but selection was limited to ones available on that catalog to keeep the same provider for all parts. Harder springs available were too wide or too long to be practical.
I'm holding back from high mounting forces, 20 lbs is more than enough. I can't measure an improvement with more force, and it can have nasty side effects: I have a permanently deformed mobo and CPU! Yes, the pcb on a 1700+ that I used a long time under big pressure, is now concave!
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