OK I have found the solution to the problem with the 43CWRT672 Kicker sub woofers not fitting back into the back wall of the car and its actually very simple. I've attached some pictures to show how to make the subs fit. You still have to trim one spot of the sub woofer casing but not other areas like the video shows posted earlier in this thread. To make the sub woofer work with the existing casing use a 3/8 inch spacer ring to move the sub out farther from the casing to give you more room between the sub and casing and to fit the wall when installing it in the car. You can purchase spacer rings on line but I used the existing ring from the stock subs with some 1/16 inch foam sheeting I bought at Michaels Arts and Crafts and glued between the casing and the spacer ring to avoid vibration of the 2 plastics. The spacer also allows you to use the stock grills since the subs now sits lower in the casing. You will have to use new screws to accommodate the spacer which are #8 x 1 1/4 inch. When installing the subs back into the car it is a bit snug but they will fit. With the new Kickers you can wire them like the the video shows in a previous post by just cutting the tabs off the spade connectors and inserting them into the push button connectors. I hope this helps anyone trying to do this because I came to dead end doing this just cutting the casing and installing the subs and the casing wouldn't fit back into the car plus the grills wouldn't fit.