Oh yeah. I haven't commented on this yet, but it's worth saying. 6 layers of dynomat? Take it from someone who used to build competition systems professionally and was a certified Dynomat distributor: one layer is all you need. The roll of Dynomat we sold was enough to do a whole car in every critical place, and it weighed less than 10lbs. Your car wouldn't even know it was there. Somebody wasted some serious money in your trunk; don't tell anyone who knows car audio you have 6 layers in there or they will piss themselves laughing at you. Get it out- and find out how much more is slathered around the rest of the car. A little goes a long way. While their product line has expanded over the years, the original Dynomat wasn't intended to keep out road noise, stop rattling or anything like that- it is designed to multiply amplifier power by keeping the audio sound where it belonged making the system more efficient. While some people have found a piece behind the license plate stops it from rattling, putting anything back there to keep it from moving would work just as well and folks have come to view it as a big expensive bandaid for getting rid of unwanted noises. That isn't what it's for.