Photos Three and Four - The model cleaned up with a scalpel blade and some sanding sticks.
This is quite a heavy casting and did not need to be based, something I normally do to all my gaming terrain.
Yesterday I had my Son to both check out my new computer and add some more RAM. This seems to have sorted out the image retrieval issues I was experiencing. In addition I took the precaution of moving all images and files to an external hard drive. Better safe, than sorry.