Next one would have to do the left side of the face, which looks to me like a long mound of gravel in a V shape. Also just inside this the ground appears to be a similar elevation to outside. The main part 4 then would be this gravel, and the part 5 showed separate here (though they are actually joined) would be a slope of gravel joining on to the lower part of the ridge. So far just by cutting into an existing ridge and making mounds of gravel about half the face could be built.
This may have been some kind of trial run area. There is a face outline. and just above it a shape like the coat hanger.
