A printed circuit board card comprising: a printed circuit board having a
first thickness and having first and second edges for inserting into
respective channels of card guides, the channels of the card guides for
receiving printed circuit boards having a second thickness, the second
thickness being greater than the first thickness; and, first and second
thickness adaptors each having a third thickness applied at the first and
second edges, respectively, a sum of the first and third thicknesses
approximating the second thickness, to thereby align the printed circuit
board in the channels of the card guides.