I had not considered hardwoods like oak, etc but if you took a 1" thick oak plank and cut it into a 2 1/2" diameter circle with a 1/2" hole and a couple if coats of polyurethane to seal out moisture...I didn't say that at all. I said you want something on top of the OEM mount that isn't compressible to achieve the proper torque value and does not squish. Aluminum, steel, brass, copper, beryllium copper, acetyl, ash, oak, maple, and a few other hardwoods would work. Each has various properties that make it more or less suitable, but all have the one we need which is enough mechanical strength to not squish.
I may just try this on one of my jeeps...
I like to experiment with stuff..
When @JMT let me help him install my 2" lift a couple months ago, he used 2" tall x 2 1/2" round poplar wood with a 1/2" hole drilled in the center, for the bump stops.
I keep meaning to change them out but they are holding up great!
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