So I need 32 inches of port and my box is 22" x 40". The port width is 6.5". So do I measure for actual port length at the outside, the middle, or the inside? Thanks very much.
Actually... f(_)ck it. I'm not gonna build a box I won't be quite happy with and waste some MDF. I'll just rebuild the one I have fixin' a few things. Maybe I'll add some more bracing, smooth my pvc flares out a bit and seal it better. When I get a new vehicle, then I can build a new box the way I want it. I just can't get enough space out of it.