I had this cage for my Canon M3 for a little over 2 months and found 3 main problems with the cage: 1) the aperture wheel on the top of the M3 is clogged and needed extra ones effort to turn it; 2) the chamber slips out of the cage due to the lack of a set screw, plug or lock washer; 3) The right side grip hides the camera's IR receiver and does not allow a remote shutter release. I fixed these issues by changing the cage myself. In my opinion, your product could have been better developed and tested.