Ruben, regarding CLA - i would consider two factors: If i know how the camera has to work (like, i have another one) and in comparison to that, the camera in case seems allright, i would not send it out. If i get a totally new for me camera however, it might seem to me that it works okay but maybe it's not, and it's on its way to break. Then i'd send it out or consult somebody experienced who can check it, at least.
Second, if all seems to work ok, and i am not sure about the person who would do the CLA, i would not send it out. He might do more harm than heal.