I am in the process of upgrading the sound system in my VX. Now that I have the hi-fi/camera/screen unit back from repair (thanks to the guys at Talking Point in Portsmouth U.K. ) has anyone removed the rear passenger internal plastic covers and if so how do you do it? I have managed to apply an adhesive bitumen covering to the inner front doors and replaced the polythene with a waterproof underfelt the result is better bass response from the upgraded speakers and a nice solid sound when closing the doors. I now intend to do the same to the rear passenger area i.e upgrade the speakers and insert sound proofing materials.