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I consider the bevel to be the entire area of the edge and the convergence of the two sides of the blade which at the tip lead to the edge. All the area that builds the edge has an influence on how...

Its up to you. At 100x they all look a little rougher than you might expect. Some of my best shavers don't look that good under 80x, but I have concluded that if they shave great I shouldn't worry...