Saare Yachts Prototype Deck Vent

This is my rough draft entry for the Saare Yachts deck vent competition. I still need to drill some holes and perfect a couple of parts, but the idea is there. Brass covers, stainless steel inners, rubber seal surface. Pull down on the T-handle to compress the spring, and then turn to engage the teeth on the T-handle with the teeth on the interior cover plate. I'm open to criticism, so let me know if there is anything I can do to improve this. Enjoy! Note: I ran analysis on the brass cover and stainless waterbreak (deckside), and found that the factor of safety for a 350 lb person placing their full body-weight on the cover (which I estimated at approximately 5 psi when dispersed across both feet) had a minimum factor of safety of 11.5.