I wonder if it's just there as a dampener for vibrations more than anything else.Just_a_fan wrote: ↑01 Sep 2017, 21:00The foam would be an easy way to customise the feel for the individual driver.One might want to feel a stiffer response to the pull on the paddle, for example. Different foams would give different resistances and would be lighter and simpler to change than a spring within the mechanism. It might just be to stop vibrations giving spurious feelings too.