I always wondered if Kryptos was hinged, as there seemed to be a gap in the plates, and the plates themselves are able to fit into one another easily. After combining, the letters would cast a shadow on the ground from a side and it would be palimpsest split along the abcissa and combined along the ordinate. The “shadow forces” could be the shadow cast on the ground by a light source lit similar to the cyrrilic projector and A,A. Then, the subtle shading would reveal the nuance of iqlusion cast at the coordinates in K2. XWHATCANYOUSEEQ
Just something to think about. Maybe from K5, and more stuff from K4 needed for solution.
Adieu
Elen sila lumenn’ omentielvo