I am getting ready to have a round brilliant diamond mounted in a 6 prong setting. Should the diamond table be "squared up" in the setting or should it be mounted "off square"? I've been told that often if the table is set to be perfectly square, the prongs are not placed where they should be. I have been advised there is a risk of the prongs resting between two facet planes (on the ridge). In addition, I have been advised that you never want prongs resting between two facets (on a ridge). Help!