Building a box for wife's 2010 Jeep Wrangler 4 door. Leaning more towards a sealed box, but I can be convinced otherwise! Prefer SQL, then SPL. 12" GCON dual 2 ohm running off channel 5&6 on Leviathan amp. Size is not a big concern, but retaining the most possible usable space is warranted with the kids, their activities, and associated gear. I can figure out the dimensionson a sealed box, but haven't played amounted with ported dimensions yet. Outside of the build specs I have a couple of questions: Should I poly fill, or not, and if so, how much? I've read on the Jeep forums that down firing is preferred. Any special considerations going this route? Should I resin the inside of the box, put sound deadened in it, or just leave it alone? Should I double the face and flush mount, especially if down firing? Any other thoughts or input? Like I said, I'm not really asking for box building design or a how-to, rather asking about box building finishing touches and optiizations. Any help you can help a noob out with, will be appreciated, and considering it will make the wife happy, will be valued as if it were gold. Thanks!