I just lubed out the caseback gasket and crown on my SSD when I first got it, and it has been fine for showering, swimming, etc. I know there are some members who have been diving with it, but regardless of the mods, I would never trust a rep for diving purposes. Just get a Seiko black monster if that's your bag. Besides, everyone knows that 99.9% of Rollie Sub/SD owners never go diving anyway!