A harvester head comprising: a frame; a position adjustable reel movably supported by the frame; a hydraulic supply comprising a pump and a reservoir; a first hydraulic cylinder comprising a first barrel housing a first displaceable piston separating an interior of the first barrel into first side and a second side, the first displaceable piston having a first rod connected to a first portion of the reel; a second hydraulic cylinder comprising a second barrel housing a second displaceable piston separating an interior of the second barrel into a first side and a second side, the second displaceable piston having a second rod connected to a second portion of the reel; a first hydraulic fluid line connecting the hydraulic supply to the first side of the first hydraulic cylinder; a second hydraulic fluid line connecting the second side of the first hydraulic cylinder to the first side of the second hydraulic cylinder; a first selectively actuatable rephasing valve fluidly coupling the first side of the first hydraulic cylinder to the first side of the second hydraulic cylinder; a third hydraulic fluid line connecting the second side of the second hydraulic cylinder to the hydraulic supply; and a second selectively actuatable rephasing valve fluidly coupling the first side of the second hydraulic cylinder to the hydraulic supply; characterized in that a controller is adapted to selectively open and close the first selectively actuatable rephasing valve and the second selectively actuatable rephasing valve to re-phase the first displaceable piston and the second displaceable piston with respect to one another, that a sensor on the first hydraulic cylinder is provided to output a signal to the controller indicating a position of the first piston and a second sensor on the second hydraulic cylinder is provided to output a signal to the controller indicating the position of the second piston, and that the controller is adapted to initiate rephasing of the first piston and the second piston based upon signals from the first sensor and the second sensor while neither of the first piston nor the second piston is at an end of stroke position, based upon a comparison of a position of the first piston and a position of the second piston. a frame; a position adjustable reel movably supported by the frame; a hydraulic supply comprising a pump and a reservoir; a first hydraulic cylinder comprising a first barrel housing a first displaceable piston separating an interior of the first barrel into first side and a second side, the first displaceable piston having a first rod connected to a first portion of the reel; a second hydraulic cylinder comprising a second barrel housing a second displaceable piston separating an interior of the second barrel into a first side and a second side, the second displaceable piston having a second rod connected to a second portion of the reel; a first hydraulic fluid line connecting the hydraulic supply to the first side of the first hydraulic cylinder; a second hydraulic fluid line connecting the second side of the first hydraulic cylinder to the first side of the second hydraulic cylinder; a first selectively actuatable rephasing valve fluidly coupling the first side of the first hydraulic cylinder to the first side of the second hydraulic cylinder; a third hydraulic fluid line connecting the second side of the second hydraulic cylinder to the hydraulic supply; and a second selectively actuatable rephasing valve fluidly coupling the first side of the second hydraulic cylinder to the hydraulic supply; characterized in that a controller is adapted to selectively open and close the first selectively actuatable rephasing valve and the second selectively actuatable rephasing valve to re-phase the first displaceable piston and the second displaceable piston with respect to one another, that a sensor on the first hydraulic cylinder is provided to output a signal to the controller indicating a position of the first piston and a second sensor on the second hydraulic cylinder is provided to output a signal to the controller indicating the position of the second piston, and that the controller is adapted to initiate rephasing of the first piston and the second piston based upon signals from the first sensor and the second sensor while neither of the first piston nor the second piston is at an end of stroke position, based upon a comparison of a position of the first piston and a position of the second piston.