Would you open a Swiss watch and monkey around? I've opened and disassembled shutters and cleaned them. If they are sticking and the speeds are off that's one thing but if a part is broken, dislodged or bent will you notice it? And what about the tools, do you have a set of watchmakers tools. Where will you get the part or parts that are broken or fly though the air and get lost in the carpet. It's not a ten minute operation either, do you want to spend hours working on it and if you don't completely document the disassembled then what happens when you try to put it back together. It soon becomes better to find another or get professional work done.