I like the button hex screws, a gasket would be nice if its not too much trouble.
If your going to make them, maybe the best of both worlds would be like a mark or a punch for the center hole but not drilled out? that way if somone has a narrow 2 post mirror like the talbot copies, they would have a mark to line up with and no extra holes.
If your going to make them, maybe the best of both worlds would be like a mark or a punch for the center hole but not drilled out? that way if somone has a narrow 2 post mirror like the talbot copies, they would have a mark to line up with and no extra holes.