anyone in SoCal have experience doing this? im a little confused on the write-up. i've installed my components up front myself, but im not sure about all the layers. i just assumed u throw away the plastic, lay down a layer where the stock plastic was (cutting a hole for the speakers of course) and then put a layer on the door panel itself (with proper holes and edging of course). how off am i? im not too concerned with water damage, but if there's a trick such as a lip u mentioned, just put it a small lip like a hangover on the top of the mid?