An adjustable tie rod , comprising: a screw rod defining a first end of the adjustable tie rod , wherein the screw rod comprises a threaded portion , wherein an overall length of the adjustable tie rod is defined as a distance between the first end and a second end of the adjustable tie rod , along a longitudinal axis of the adjustable tie rod ; a tie rod shaft extending between and coupling the first end and the second end ; a gearbox fixed with respect to the tie rod shaft ; an adjustment actuator operatively coupled to the gearbox such that selective actuation of the adjustment actuator causes translation of the screw rod along the longitudinal axis and with respect to the gearbox when the first end is prevented from rotating about the longitudinal axis , thereby adjusting the overall length of the adjustable tie rod , wherein the gearbox comprises a gear rotatably engaged with the threaded portion of the screw rod , wherein the adjustment actuator comprises an adjustable knob configured to rotate a worm gear via selective rotation of the adjustable knob , wherein the worm gear is engaged with the gear of the gearbox such that rotation of the worm gear causes corresponding rotation of the gear about the longitudinal axis , characterised in that the gearbox further comprises a locking mechanism , wherein the locking mechanism , when engaged, is configured to prevent rotation of the worm gear , thereby preventing changes to the overall length of the adjustable tie rod when the locking mechanism is engaged, and wherein the locking mechanism comprises a thumb screw engaged with the worm gear . a screw rod defining a first end of the adjustable tie rod , wherein the screw rod comprises a threaded portion , wherein an overall length of the adjustable tie rod is defined as a distance between the first end and a second end of the adjustable tie rod , along a longitudinal axis of the adjustable tie rod ; a tie rod shaft extending between and coupling the first end and the second end ; a gearbox fixed with respect to the tie rod shaft ; an adjustment actuator operatively coupled to the gearbox such that selective actuation of the adjustment actuator causes translation of the screw rod along the longitudinal axis and with respect to the gearbox when the first end is prevented from rotating about the longitudinal axis , thereby adjusting the overall length of the adjustable tie rod , wherein the gearbox comprises a gear rotatably engaged with the threaded portion of the screw rod , wherein the adjustment actuator comprises an adjustable knob configured to rotate a worm gear via selective rotation of the adjustable knob , wherein the worm gear is engaged with the gear of the gearbox such that rotation of the worm gear causes corresponding rotation of the gear about the longitudinal axis , characterised in that the gearbox further comprises a locking mechanism , wherein the locking mechanism , when engaged, is configured to prevent rotation of the worm gear , thereby preventing changes to the overall length of the adjustable tie rod when the locking mechanism is engaged, and wherein the locking mechanism comprises a thumb screw engaged with the worm gear . <EOS>