I don't have a C270, so I borrowed the measurements for the box part of this one and married them up to a slot mount I designed for the C920. The camera base slides in with no modification now and chills comfortably with the nozzle right in the middle of the frame.
The version uploaded does not have all the text and stuff on it, it's clean for you to add whatever you'd like to it! Have fun!
The author remixed this model.
Only used for mounting box and hole measurements/locations, but changed mounting arm to a mounting slot and relocated the camera mount position higher and further forward on the printer to keep the nozzle as centered as possible.