[88Stanger]

you know eventually i will stop this madness, lol. Ok, so after some thought i forgot that i have abandoned the idea of the using the shoulder harness bar, so that allows me to go up to 18" in height. After doing the calcs as you SkinnyG showed, i would end with .90 cubic ft of airspace for the two vented 10" subs, this is increasing the height to 18" and excluding the vent space. The calcs according to JL Audio appears that they want Volume Net Int. to be .90 Cubic Feet. Looking at their suggested ported box with vent i am very close. so not i am looking at maybe going 1" longer on base just to get a bit more volume.
LOL i am killling myself here, but this is what happens when you are anal about things and you have been locked up in the house for almost 2 weeks.... lol Sorry about all my confusion SkinnyG! I will owe you one... two ... three... lol