So I made a rookie mistake and didn’t calculate for the thickness of the sub above the surface of the enclosure. I calculated for the driver displacement and excursion but didn’t realize the face of the sub was so thick. 3/4” thick. This had me scrambling a bit and thinking I would have to start over but I just so happened to have made one good mistake. I miscalculated one section of the box where I was to remove the thickness of the MDF on both sides giving me more volume. After triple checking my calculations I was able to reduce the depth at the bottom from 7” to 6.5”. This allowed the sub to be clear of the back seat and still give me the .80 of cubic feet volume that I needed. Re-trimming all of the center and end supports was all that was needed.
I do not have a router and want to remove 1/4” of surface area for counter sinking the sub so I will probably take it to UAF tomorrow and have them do it, along with installing the terminal posts and wiring it.
so today is time to pre-drill, glue, screw, and install everything. I am going with the aluminum block off plate. Should work perfectly. Pics to follow.