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Hi,
From my findings, the insert ones are a poly resin type, ideally for motorsport or trackday use as they are pretty solid. Fitting of it is straight forward enough but the cabin vibration will increase.
The design of the OE part allows enough absorption, plus rigidity. As mine failed twice, in the gaps in the OE design, I sleeved in silicone strips to reduce the twisting under load.
It might not help but you never know!
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It will all end in tears I tell you.......
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