Good morning mpergola. We have different boats and therefore different requirements / price points! I replaced mine with Beckson and all six ports now open. Great ventilation! Additionally, before I installed the ports, I removed about an inch of the wood core surrounding the port and replaced it with epoxy to reduce the chance of water damage.
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I attached a photo showing the amount of wood core that I removed. Also, I've had problems with the barrell bolts loosening and plan on replacing them with pan head SS machine screws and nuts with nylon inserts. This may have resulted from vibration while going 55 mph to winward.