William - I just checked my Sinar-Technika adapter against a series of Nikon-branded, factory-drilled Technika-clone boards. The number 0 and 1 boards have off-center holes, but with the number 3 board, when the board is mounted on the adapter, the holes are aligned so that the axis of the lens mounted on the smaller board will be exactly on-center for the opening in the adapter board.