Hey i got 1 15" punch hx2. I want a ported box its been in sealed for a year. I can go 28" wide, 12 tall then 16 tall there is a little ledge thing, i have a 97 taurus. I got deminsions drawn up that make a 2.5 cf box (reccomended) with a step type thing to fit in the ledge. if i do that i will use a lightning audio aeroport. how could i use a slot vent for that application i would almost have to point it all upwards. please help