Hi everyone, I have a Tag Heuer F1 watch and the crown doesn't screw in anymore. Now before I send it into Tag Heuer, I want to see if I can fix it myself. The biggest problem is removing the stem so I can see if the threads on the crown have been pushed back perhaps. When I open the case back I see a very small hole with an arrow pointing towards it. Is this a push down release mechanism or is it some kind of unscrewing mechanism that requires a very small flat screw driver?