I'm building a ported enclosure for my 6.5s, and I am wanting to make it an easily removable piece. I also want easy access to changing polarity for imaging once I begin my tuning. I am thinking about mounting banana plug mounts into the fiberglassed enclosure. The only problem is that the center of the terminal is hollow. Will the tightness of the banana plug be airtight enough? I will obviously silicone or fiberglass around the mount, but will that be enough?