i vote you cut up that box lol. i mean test it as it is like everyone already said. but if you think it should be louder, sound better, or you just think you could have made the box better, go ahead and remount the subs in the same box and test it. if its better sub and port back you could add a second "baffle" to the top to cover the holes and make the box stronger. i would obviously recommend you build a new box after but that is a cheaper option that will work and get you your answer.