hi, i have some v1.SE .70mils stuff. most people say to put 2 layers of the .45mils stuff in our car, does that mean i only need the 1 layer since its thicker, or is 2 always recommneded?? also in my hatchback in the trunk, do most people that already dont have a installed sub system build in that area, put the spare time back after deadening the car ?? i know , its a stupid question. and finally, when you caut out the deadening for such a large area as the wheel well, is it recommneded to lay it down as 1 big piece as much as possible without cutting it a lot or does it matter if you have many many pieces all over?? thanks!