I have just purchased the four head set up for my silver 2003 Porsche 996 turbo and the install locations are VERY limited considering how most of the front is just flimsy plastic. I am sorry I don' t have any pics but this model is very easy to find on the net. So to get to my question...Should I just mount two heads in the front and put the other two in the back? Or should I put three up front and one in the back? Any and all help is much appreciated. Thanks in advance.