I've seen it done, but never with gutter mounted feet. Always instead with aftermarket roof rails embedded in the roof panel channels. Can't go back after that.
Ironically, this first pic is the truck that belonged to the fellow that you had the issue with regarding the JSQ qpg's in SD/Napa. Second pic is either an SD or Voyager from a p38, but nearly identical to voyager's l322 rack. Again, a clean, but irreversible install.
"Barry is correct!"