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Hey guys, I'm currently starting my (2) 12" Ethos build and I was planning on firing both the subs and the port into the cabin of my 2013 Toyota Camry. So far, I'm framing out what I can in the smaller oval shape opening behind the seats that Toyota decided needed the be there. It's about 36" wide, 15" tall, and about 8" deep. I'm basically laying 2x4's down until I get to the point where I can have a flat surface in my trunk for my enclosure to bolt up to. This oval area will be dead space from the inside of my car, so I may do some fiberglassing and "pretty" that area up with LED's, or something of that nature. Now, as this is an oval, and 2x4's are straight, I will obviously have some gaps that aren't/won't be sealed off completely. This will in turn lead to cancellation from the sound going back into the trunk, and that's not what anyone wants. Can I tape off the edges there and spray some of that expanding foam in these gaps? What is the best solution to this problem? If there are any other hints/tips on sealing a trunk properly, I would GREATLY appreciate any comments, as this is the first time i've ever done this. I'm here to learn from some of the best in the business, so as always, anything thrown my way is appreciated. I probably need to post some pics to better explain this, but maybe there are rules to sealing off a trunk that I don't know. If there are some do's and dont's about sealing, it would be great info to know. All I plan on doing is framing out that hole, then basically put heavy duty L brackets on my enclosure and butt it up against the frame to secure it. I would then glue/caulk/or silicone the edges to make sure they were air tight. It's all the area around my enclosure that I'm trying to wrap my head around. How will I keep sound from going back into my trunk? Sitting here scratching my head now...