Hey all. Me again.
After some cursory research I noticed that a lot of places are suggesting up-firing for hatchback builds, which frankly would make my life a lot easier in a number of ways. Since the hatch has slanted back seats, I could more effectively use trunk space by building the box flatter but longer. For rear-firing I can do, at most, 17x16 for the height and depth to give it room for breathing in the back, but I can do at least 13x22 if I fire upwards.
Now if I do that, I get a secondary boost in that it'd be easier to use aero ports than a slot because a 22" wide slot would be gigantic. So my quick question is just this: can I get a basic rundown of mounting/construction on these things? I'd probably be using 4x12 ports, two of 'em, to get my ideal tuning of ~33Hz at 4.2cu.