Patent ID: 7854667

Claim:
In a virtual X, Y, Z orthonormal coordinate system in which a sole portion of a golf club is substantially congruent with a bottom-most XY plane thereof, in which a face plate of said club intersects a forward-most XZ plane of said system, and in which a heel and hosel side of said club intersects a YZ plane thereof substantially at an origin of said coordinate system, and further in which an increase in X-axis value corresponds to a direction of a toe of said club, an increase Y-axis value corresponds in direction to a rear of said club, and an increase in Z-axis value corresponds to an increase in height above said bottom-most XY plane, a golf club adjustment system, comprising: (a) a club head having a void space behind said face plate of said club and above said sole portion thereof, said void space substantially conformal in geometry and volume to that of said club head; and (b) two selectable golfer replaceable weighting elements in which at least one weighting element thereof is not contiguous to any part of said face plate in which a selected coordinate value upon the Y-axis in any one of said weighting elements does not equal a selected coordinate value of Y of at least a second one of said weighting elements, and at least one selected weighting element is not contiguous with any inner surface of said void space, said selectable elements comprising any two of: (i) a weighting element secured substantially within said void space between a lower Y, lower Z coordinate, to increase backspin, to a higher Y, higher Z coordinate to decrease backspin; (ii) a weighting element secured substantially within said void space between a lower Z coordinate, to increase trajectory, to a higher Z-coordinate to decrease trajectory; or (iii) a weighting element secured substantially within said void space at a lower X-coordinate, to compensate for hook, to a higher X-coordinate to compensate for slice.