Well i had a problem with building my ported box for my stroker 15.. besides lack of ambition lol,.. The problem was that im planing on getting a stroker pro, but the 2 box sizes where 5 cubes for the regular stroker and 3 for the pro, i got the updated spec sheets from cerwin vega now the stoker is 3.2918 cu ft and tuned to 32 Hertz, and the pro is 3.3589 cu ft.tuned to 25 hertz so im going to build a box for the pro but tune it for the regular and when i get the pro ill change the port..i didnt want to build 2 different boxes.. cause of how im makeing my amp rack so yeah i have one problem down only a couple more to go