"IF weaking of them were any concern, I dont think anyone would do it."
I've seen multiple car stereos wired with scotch tape. By this logic, just because the stereo works, and a fuse hasn't blown, or the car hasn't started on fire, using scotch tape is OK. It's not.
I guess I'm just looking for a more technical answer: "The aluminum will retain its strength as long as it's not heated over xxx degrees." That sort of thing.