Yea that’s what I’m going to do I was just trying to match the floor and use the same stuff as I used for the floor but it didn’t work out the greatest
Man with that kind of glue you spray both surfaces and let it sit and get tacky to the touch then mate the two surfaces together. You can't spray it and mate them as soon as you finish spraying them, it's never going to hold
I give you a A+ for creativity but damn does that take up 99% of the back. Id go for a box that mounts on the roof near the back window so you have all your highs up and out the way or put your highs on the doors but your going to want bigger subs over that huge highs box