Today my wife and I fibered the interior I like to make button gaskets out of delaminated  fiber about 1/2 thick You need to add loft to the job as the fiber will shrink at cone 10 no matter what its says on box-I tend to add this loft in two directions . I made these buttons and shipped them over. I use these pliar's to make the pig tails which keep tension on the button.The gaskets keep heat off the wires and add life to job.