- Structure 602 cannot be found from the general area to where it has been marked in the map.

- The rock contains a huge amount of places, to which could have been used as a shelter with a minimum work. Ready depressions in the rock just wait for logs or tent to be put up in the depression. From these kinds of constructions there of course isn't anything left to be seen now after over sixty years.

- It also seems that all of the structures numbered starting with a number six, were located behind of the main defensive line and thus were secondary importance. It is very likely that the constructions were planned, but never really started in any degree.