Funny story I thought I'd relate. I bought a dud of a Suunto Cobra console a few weeks ago. Not only did the depth sensor not work, but the SK-7 had a crack in it and was empty of fluid. Well, when I tried it in the pool, it partially filled with water. This gave me a brilliant idea: maybe I can just fill it with water and seal it back up! So I disassembled it and tried submersing it in water but it wasn't filling up, so I decided to make a small fill hole and then seal it back up (genius, right?). So, I got the smallest finish nail I could find (no hypodermic needles nearby), heated it up with a torch, and stuck it in the base of the compass. It cut through like butter, all was going smoothly. I proceeded to fill it with water. That went well too. Then, I heated the nail up again so I could smear the plastic back over the hole. Well, the plastic shrank away from the heat to the point that there was only a very thin layer of plastic. At this point, I realized that the entire top of the compass was filled with cracks (I had to fill it with water to discover this) so I flipped it over and water poured out of my newly made patch. Comedically infuriated, I tossed it in the trash and walked away. Just thought I'd share my brilliant idea last Friday.