I must be lucky. I have had banged up and heavy scuff ups and evena good dent with a crease. No leaks. I have used FRAM to NAPA to the currnet WIX. I think most of the filters are all made by one company and packaged for each retailer.
Maybe I should just use a vegitable can polished up and do the duct tape thing. HMMMMM
Of course NOW that Ihave said this I may have Jinxed myself.

Mal: "Y'all see the man hanging out of the spaceship with the really big gun?{ref, Jayne} Man's lookin' to kill some folk. So really, it's his will y'all should worry about thwarting."