As for the original question. Put them on outside edge. You can also put them here and there in the spread--it lookss like a goose stretching its wings and there is the movement to like a sock which isa bonus. For Canada geese--it is best not to mount them up high on poles, but 2' off ground when mixed in, or at most 5' off ground at outside edges.---It seems as if the geese will not commit all the way beacuse I think they are waiting for the magnets to land if the magnets are up in the air 10'.