I see your logic but this is the age old "chicken & egg" thing.

Did your bent rails cause the regulator to go FUBAR or did the regulator fail letting the glass tilt which caused the rails to bend???

We'll probably never know. I'm attacking the one known problem: the guides for the vertical track can not hold up to the stresses put on them. After I get my arms wrapped around that problem, I'll look into the bent rail issue.

BTW, if your rail is bent & you just replace the glass run (rubber weather strip), aren't you just kicking the can down the road. The new glass run will cut/tear eventually.