It's the depth of the port that has me concerned. If you add 3/4" for the baffle, 6 1/4" for the interior width of the port, 3/4" for the inner port wall, and 3/4" for the front panel, that adds up to 8 1/2". The depth of the cabinet dimensions on the plan is 9 1/4", so that leaves only 3/4" of free space between the inner port opening and the front panel. Before I proceed to permantly glue up the port I just want to make sure I was reading the plan correctly.