I used an old ice-cube tray to hold the different screws. See the little colored dots in the different compartments.These dots are also on the camera as I removed the screws. The screws are all the same diameter but are in different lengths.There are silver color ones and black color ones. There are (3) different lengths of the silver ones with a total of (17). The black screws there are (3) different lengths for a total of (9) screws. Some of the screws are machine screw thread and some are self thread for plastic so keep them sorted out. I used a 2mm Phillips driver and the long fine nose plier was used to dis-connect the cables.There are two cables to dis-connect. One at the Mode Dial assembly and one from the back of the camera