Has anyone used all four tweeter locations in their TL?

Was thinking about setting up the rear view mirror tweeter pods as a center-channel. Anyone using such a set up?

 

from what i know the two speakers near the dome lights/ rearview mirror already roughly act as a center speaker... i can be wrong on this one... (since i know there are "true" center channel speakers.. if you wanna spend the $$$)

my setup is that i put in my kicker tweeters in the spot behind the sideview mirrors, and then hooked up the factory original 4 tweeters so they "Act" as center channel speakers

this ain't a bad way to do it in my opinion.. i've gotten a lot of praises for the great sound staging in my car (espeically from the front seats)