Buck be da (box) MAN!How many in^2 of area do you have for the exit holes under the box? That's what I always look at, just like how you'd design a t-line, based off the Sd of the woofer, somewhat. Like, if you have a total bottom opening surface area that's at least the Sd of the sub or maybe the Sd + port area net, then it sort of shows a relative restriction won't happen, because the bottom of the box has more radiating area than all radiating surfaces of everything in/on the box. That's one way to look at it.