A seed-double eliminator is described for a seeding machine that moves seed along a seed path. The seed-double eliminator may include a mounting fixture mounted in a fixed position relative to the seed path and a slide member mounted to the mounting fixture. Various flexible extensions, such as various brushes, may extend from the slide member toward the seed path. The various flexible extensions may thereby contact at least one seed of a seed-double pair being moved along the seed path by the seeding machine in order to remove the at least one seed from the seed path. The slide member may be configured to mount to the mounting fixture in various locations, thereby altering the distance that the flexible extensions extend toward the seed path. A seed deflector may also be provided, for directing seed toward a seed pool after the seed has been removed from the seed path.