im bulding box and its pretty shallow so if i needed a port 4in dia and 12 inches long, could i do two 4in dia ports 6 inches long? when i put it into win isd. the port length doubles and im not sure what to do. thanks.
No you can not do 2 - 4" ports. By doing that you are doubling the surface area of the ports. Anytime you add another port (of the same size) you have to either double the length, or decrease the surface area by half.
Why don't you just do a slot port and bend it around the box??