A method for differentially adjusting a first deployable lift device and a second deployable lift device and a third deployable lift device on a wing, wherein said first deployable lift device and said second deployable lift device and said third deployable lift device are coupled to a single power drive link, said method comprising: determining a first desired position for said first deployable lift device and a second desired position for said second deployable lift device, based on a desired position signal; activating a first motor to move said first deployable lift device by a first total movement amount, said first total movement amount being determined by subtracting a first current position of said first deployable lift device from said first desired position; determining a second total movement amount for said second deployable lift device by subtracting a second current position of said second deployable lift device from said second desired position; determining a first differential movement amount by subtracting said first total movement amount from said second total movement amount said second deployable lift device will move; and activating a second motor to move said second deployable lift device by first differential movement amount; the method further comprising: determining a third total movement amount for the third deployable lift device by subtracting a third current position of said third deployable lift device from a third desired position for said third deployable lift device; determining a second differential movement amount for said third deployable lift device by subtracting said second total movement amount from said third total movement amount; and activating a third motor to move said third deployable lift device by said second differential movement amount; wherein the method further comprises: determining said second current position by adding said first current position to a first differential position, wherein the first differential position represents an absolute measurement of the motion of the second motor from a zero position, measured using a rotary sensor; and determining said third current position by adding said second current position to a second differential position, wherein the second differential position represents an absolute measurement of the motion of the third motor from a zero position, measured using a rotary sensor. determining a first desired position for said first deployable lift device and a second desired position for said second deployable lift device, based on a desired position signal; activating a first motor to move said first deployable lift device by a first total movement amount, said first total movement amount being determined by subtracting a first current position of said first deployable lift device from said first desired position; determining a second total movement amount for said second deployable lift device by subtracting a second current position of said second deployable lift device from said second desired position; determining a first differential movement amount by subtracting said first total movement amount from said second total movement amount said second deployable lift device will move; and activating a second motor to move said second deployable lift device by first differential movement amount; the method further comprising: determining a third total movement amount for the third deployable lift device by subtracting a third current position of said third deployable lift device from a third desired position for said third deployable lift device; determining a second differential movement amount for said third deployable lift device by subtracting said second total movement amount from said third total movement amount; and activating a third motor to move said third deployable lift device by said second differential movement amount; determining a third total movement amount for the third deployable lift device by subtracting a third current position of said third deployable lift device from a third desired position for said third deployable lift device; determining a second differential movement amount for said third deployable lift device by subtracting said second total movement amount from said third total movement amount; and activating a third motor to move said third deployable lift device by said second differential movement amount; wherein the method further comprises: determining said second current position by adding said first current position to a first differential position, wherein the first differential position represents an absolute measurement of the motion of the second motor from a zero position, measured using a rotary sensor; and determining said third current position by adding said second current position to a second differential position, wherein the second differential position represents an absolute measurement of the motion of the third motor from a zero position, measured using a rotary sensor.