1 solution to a lot of slack, but the belt loses its appeal
2nd place solution in the left hand, but it did not go at all to the development and not particularly comfortable to take a picture.
3 solution, the best I've found, place the left hand strap but below the casing (see photo) perhaps not highly recommended becuase the 2 points of the strap are fastened to the base and not screwed on the case of anchor points
Still disappointed