I have this problem here definitely not. The belt is located on the left shoulder on a wide, but not too thick cushion. Against slippage during high Take the camera assures him under the arm-length, second strap that are both adjusted in length can be removed (good for thicker jackets) and completely.
The camera runs on a wide metal guide that attached a carabiner on the on the camera (tripod thread) Adapter (FastenR3) is attached. This has the decisive advantage that the camera can be removed from the belt without removing the screw in the bottom of the camera, as is necessary when Sunsniper. The carbine is and secured against accidental opening with a strong plastic clip.
The belt also sit two metal clips, with which the "way" the camera can be adjusted on the belt.
The whole thing makes a very high-quality and extremely carefully crafted impression only slightly high price for individual adapters (16-20 / piece) is not so great - but I have ordered two pieces. I've been using the belt the way with several Olympus cameras (E-M1, E-P5, e-PL7) and some old, some quite serious analogs (Nikon FM2, Minolta XD7).
I'm looking forward to the first longer tour with the Black Rapid ....