Doesn't it suck when you get a new rep and after a couple of days it stops, the clasp breaks, you loose a bracelet screw or even worse the bloody thing falls of your wrist.....Especially losing parts is very annoying as these are often very hard to source.   With a few basic tools, which are all avialable in the RWG Toolshop btw..., you can prevent in many cases these annoying issues.   Tools I use to do a quality check when a new rep arrives are: * a decent screwdriver set * An eye loupe * Sticky ball to open just about any screwdown caseback * Rodico cleaning putty * Tweezers * Springbar tool * Quick caseback and O-ring creaser     The first thing I always check is if the screws are screwed down tightly, in this case it's a Rolex which has screws on the bracelet, but in case of a Panerai be sure to check the Crown Guard screws!     Next is the rezising of the bracelet, be sure to keep the removed links....if at a point you want to sell the rep it's best to have the bracelet complete with all the links     With Rolex reps the bracelet is often quite dirty and the links can be a bit stiff, to make the bracelet smooth WD40 is great for cleaning and making the bracelet feel smooth....be sure to keep WD40 away from the movement! Just let the bracelet soke for a couple of hours in WD40 to get rid of any debry stuck inbetween the links. After that rinse the bracelet with warm water and it will feel much better.     After that it's time to have a closer look at the movement, to check if the rotor is screwed down, movment tab screws and to see if the inside is clean.....sometimes there're undeifined pieces of lint, dust, hairs floating around..... :P     There are many caseback openers available but the sticky ball works perfect for 99% of the caseback...just press it down firmly on the caseback and unscrew....Often the caseback is fairly loose upon arrival, so it should be coming off without any difficulty     I then grease the caseback seal....often they are very dry and creasing it will improve the water resistantcy of the watch     Now it's time to check the movement tab screws, a check if the hairspring isn't tangeled and quick look with the eye loupe for dust, pubichairs etc.....     Small dust pieces or any other undefined crap are easily removed by tweezers or rodico putty....it is also a good idea to swipe the caseback threads....9 times out of ten the thread is filled with debry.     When this is all done place back the caseback seal, screw down the caseback tightly, refit the bracelet and your new rep is ready to be worn.....and most likely the chance of screws falling out or movements stopping etc, etc.... will be very unlikely!!!!