ok i have a 2001 buick century and it has a set of tweeters stock above the door handles and i am replaceing the 5.25s up front with a 2 way set most like mmats cs52 or something like that and am putting in 2 12" L5s .... should i replace the stock tweets or should they be fine or i could even add an extra tweeter at the corner inbetween the windshield and the window... should i do either? or will it not really matter?