E, Yes I checked under there and yes it sucked big time. It is now sanded and painted with the oem touch-up. I used thede lil nuts surrounded with rubber that fit into the hole and when u screw the bolt into them they expand a lil bit, plus a lil silicone. I have the oem nutsert package in my garage but when I removed the original nutserts that were spinning like yours I pulled the nut right through the roof and defprmed the hole on two of them that the new nutserts would not fit properly.
So, one year later everything is holding up great except where the paint has chipped off the small areas where the silicone had oozed out and was in contact with the paint. I should have cleaned up theses small spots a lil bit better. All in all though the removal was a success. My truck was a Seattle truck and 2 of the nutserts and all 4 contact points of the rack were rusted.
Hope this makes u feel better hehe,
Vince