Pete, you understand that Antarctica has been traversed many times now.
A circumnavigation of the globe has been done via both poles.
Those are some nice opinions you have there.
This got ignored in another thread, so I am giving it another go;
There has been several expeditions to Antartica as I am sure you know Pete, since you mention the research stations. Since Roald Amundsen was the first to reach the South Pole in 1914, Antartica has been crossed on foot, by planes and circumnavigated. No ice wall has hindered these expeditions, and Antartica is surrounded by sea on all sides. No ice wall extends from Antartica making it impossible to circumnavigate, and no "edge" has been found on either side of it.
In 2012 a Norwegian expedition followed Roald Amundsens route to the South Pole starting from Ross Barrier up the Axel Heiberg glacier. From the South Pole they went to Hercules Intlet. The went on foot the entire distance. They started by sea and reached the sea. No extended ice wall was observed, and no "edge" found.
In 2005/2006 Norwegian Rune Gjeldnes went by foot from the Novo Station in Queen Maud land via the South Pole to Terra Nova Bay. Sea at starting point, sea at end point. Again, no extended ice wall observed, and no "edge" found.
Links and references can be provided. Actually; I also have Rune Gjeldnes phone number if you would like debate his observational skills with him.