If you are looking for smoother arm movement, check out this special lubrication! A small amount of lube on each joint will loosen the arm to reduce springback. Note that the smooth operation comes at the cost of holding ability. The amount of weight the arms can hold will be reduced as a result of the reduced friction.
This lube is non-greasy and dries clear. This one 2mL bottle can lube up to 4 arms.