I've had couple of 21j reps that I've waterproofed as the only entry point was the caseback, crown and faux He valve. I just bought a TAG Carrera Calibre 16 41mm with an A7750 and I'd like to at least make it water resistant so I can wash my hands with it, clean it under the faucet, etc. Is there any info or guide to sealing the chrono pushers and crown? It isn't a screwdown crown so I have no idea what (if any) water prevention devices are in place and I don't really want to tear it apart without some idea of what I'm looking for. Any help would be appreciated, thanks.