Hmm, sorry again, I didn't go to school in the UK and I am a bit of a clumbsy writer, didn't know what word to use to explain the starters level as it takes some time and go through different stages to learn how to intepretate the stone, this is a consistancy.
How then the stone gets read/translated is for everyones own interpretation, like this came out of the last stone - Stanton painting, sticking to my own photo, but perhaps someone else gets the image at a slightly better angle and it comes out better or slightly different, sometimes there are 2 images to a stone, sometimes non. But the measurements will be there.