Also keep in mind that with a joystick, the only time it doesn't send out an analog/digital signal is when its at the center position. If they behaved like some real flight controls and not return to center, a constant signal will be sent to the joystick to the computer. This will cause whatever you're controlling to move in the position the joystick is at. It's not just a simple thing as removing the springs from the stick to make it like you described.
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