ok so i have two new fi bl 15" on the way and im gonna put em in the back of the caddy. i've got 18" height, 43" of width, and 41.5" depth to work with. i need a box. im lookin at the 34Hz range and i'd like to give em each around 4cuft if i could. anyone have any suggestions whare i could find some plans on somethin like that?