Yes, thanks - I shrunk the covering using an iron (with sock) on the higest setting. I especially adhered the covering to the ribs (all 3 in each wing - probably not enough structure to absorb engine vibes). I even ironed on a couple of matching white squares of 21st Century fabric on the wing bottom, just behind the gear. I thought maybe to change the frequency or eliminate the noise - didn't help. But, this also helps keep the wheel pants from punching through the wing when you rip the gear off. Don't ask how I know.

That darn drumming. Anyone else's have this phenomena.