Mir is the part canceled after a few hours use. The design is inside held by two mini screws that are against secured by an extremely thin plastic disc. A predetermined breaking point one might suspect. Did it then but zusmmengeknallt with the hot glue gun. The function of the rotary ring is no longer guaranteed, but snapping at the camera provides noticeable enough grip. I would, if I were to do it again look for another product.