yes, I have a mightyvac. I have not revamped my computer system yet to install the 5 cd set....and my new used manuals have not arrived yet. There really is no rush at the moment, just that annoying sound. I do not think it is affecting the vent doors at all, as everything still seems to blow where it should, even while it is thumping.

One interesting note....that actuator that is accessed through the glove box, that is mounted on the right side of the center structure...I was actuating it over and over, and sometimes around the middle of sucking in, it would hang up for just a second a little cockeyed, and make a little thump sound of its own....but it would continue on its way fine.