fb enclosure 4 12 l3's in 05 trailblazer

Hey everyone, I'm planning a build on an enclosure for 4 12" kicker L3's (2ohm) I'm comfortable using fiberglass/bondo/sanding etc., but could use any insider tips/tricks from those who have done this before. I'm no expert in volume calculations or port building etc., but I'm a quick study. I have the general idea of how I'd like the box to be designed, and will upload a few pics when I can. Thanks in advance, Chris2015 f150 xlt

the outside squares are the positions of the 4 12" L3's, the black at the bottom in the middle, the port, and the red squares in the middle will be either both plexiglass, or plexi on the bottom, and just painted/chevy logo on the top. 2015 f150 xlt