I am starting my new sub project, which is actually for school as well as for my own fun. It looks something like: 3.5 cu ft Shiva MkII tuned to 25hz via a 12.25" long 4" wide vent. I went with a higher tuning than most since I want the mid-bass punch I did not experience from my larger previous sonosub, a EBS design. This one is geared mostly towards techno and hiphop music with a smidge of HT use, so stop me if I am doing somthing wrong. I need to know: 1)how is the tuning for the application? Note that I am ordering a PNR aeroport from Parts express which is 16" total length including flares, so I need one that is smaller than that obviously... 2)how much volume does the shiva mkII driver displace? 3)has anyone felt the need to stuff/line a vented enclosure such as? Dan mentioned that in the 95L design of the white papers, 32oz of polyfill was good for the design. Why, and how? 4)can someone tell me where to find the link to the scratch n dent section of the adire website? I cant seem to find it... thanks!