We saw the Vijay TV Programme which has been Videoed & the Links of which has been kindly provided by Mr Thiyagarajan below. An important conclusion arrived on same by Kudavayil Balasubramanian & M/s Sathiyabama is that the so called single spherical stone which has been placed at the top of Thanjai Rajarajeswarem Temple is not made of a single stone but out of eight pieces like the that of a pealed orange fruit.
Some of the Archaeological Experts had the privilege of seeing this stone at that height by stting up special scaffolding put up to reach same.
For the benefit of others who didnot have such privilege I give below the Link to a Youtube Video URL from which they can see this stone at close vicinity.
Video Website:
This Video provides the "Aerial Views" of both the Rajarajeswaram Temple Complex at Thanjavur, and the Gangaikonda Cholaeswarer Temple Complex at Gangaikonda Cholapuram, among the views of the other Temples.