An apparatus for affixing an intramedullary device having a curved longitudinal profile, the apparatus comprising: a jig affixable to the intramedullary device at a proximal end, the jig comprising: a guide arm; and a second arm; the guide arm having a distal end movable relative to the second arm, said distal end movable between a non-aligned position in which the distal end is configured to be laterally spaced from the distal end of the intramedullary device, and an aligned position in which the distal end is configured to be aligned with the distal end of the intramedullary device, wherein in the non-aligned position, the guide arm is angled from the aligned position by at least 5 degrees, and drill guiding means suitable for guiding affixment means towards the distal end of the intramedullary device, an alignment adjustment mechanism configured to move the guide arm between the non-aligned position and the aligned position, wherein in the aligned position the guide arm is biased away from the second arm towards the non-aligned position; wherein in the non-aligned position, the longitudinal profile of the guide arm is curved between the proximal end and the distal end, wherein the curve of the longitudinal profile of the guide arm varies between the non-aligned position and the aligned position and the radius of curvature of the longitudinal profile of the guide arm is greater in the aligned position than in the non-aligned position. a jig affixable to the intramedullary device at a proximal end, the jig comprising: a guide arm; and a second arm; the guide arm having a distal end movable relative to the second arm, said distal end movable between a non-aligned position in which the distal end is configured to be laterally spaced from the distal end of the intramedullary device, and an aligned position in which the distal end is configured to be aligned with the distal end of the intramedullary device, wherein in the non-aligned position, the guide arm is angled from the aligned position by at least 5 degrees, and a guide arm; and a second arm; the guide arm having a distal end movable relative to the second arm, said distal end movable between a non-aligned position in which the distal end is configured to be laterally spaced from the distal end of the intramedullary device, and an aligned position in which the distal end is configured to be aligned with the distal end of the intramedullary device, wherein in the non-aligned position, the guide arm is angled from the aligned position by at least 5 degrees, and drill guiding means suitable for guiding affixment means towards the distal end of the intramedullary device, an alignment adjustment mechanism configured to move the guide arm between the non-aligned position and the aligned position, wherein in the aligned position the guide arm is biased away from the second arm towards the non-aligned position; wherein in the non-aligned position, the longitudinal profile of the guide arm is curved between the proximal end and the distal end, wherein the curve of the longitudinal profile of the guide arm varies between the non-aligned position and the aligned position and the radius of curvature of the longitudinal profile of the guide arm is greater in the aligned position than in the non-aligned position.