@ported, Iv no rattling issues as such and hopefully it stays that way!
Idea here is to eliminate road noise which creeps into the cabin pretty easily. The 2nd layer of damping on the inner door panel also doubles as a protection against rattles developing if any.
A simple knock-test shows the effectiveness of the damping as compared to the undamped doors. The front doors especially shut with a re-assuring thud vs the normal tinny sounding clink.
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