I'm populating a new playfield for a Monopoly and I'm at the point where I need to drill through and mount the pop bumper twist shank screws. Does anyone have advice on a good bit to countersink these? They are two small for a spade bit and all of the countersink bits I have seen have a sharp taper. Do I even need to bother countersinking it? I notice that the original board had them recessed so figured I should copy. thanks -stan