Hello, I'm trying to design and build my own sub enclosure for my 2 level 5 m2 12's to go into my 2014 charger. The seats come down so I wanted to have the sub firing into the cabin. My measurements for my trunk is 16H x 32W x 30D. I wanted to build a 3.0 cubic ft box with a tuning to 32 or 34hz. I want to learn how to use the program to design it myself, I cannot for the life of me get the tuning low, and the port area I tried to keep it @ 12 to 14 mainly the lowest I can get it. It's going to be for daily but I love the lows. If anybody can help me and guide me to the way I can learn the program or another program that I can use to design an enclosure. Thanks in advance ?