okay i have some good reference on how to calculate everything on a tline i got the sq port area and the length i need im wondering if i can fire the sub foward and the port up? In the demonstation i have been reading over in the SMD fourms it has sub firing up and port to the side below the sub. If so how could i go about making those bends?

Im going to try it with a DD3515 to get a little more thump with what i got until i can afford to upgrade to 2 subs and do my blow through in my truck.

Any advise would be appreciated.