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MODIFY BALL BEARING ROTARY SPRING GUIDE.
āŗRotary Shaft Design
āŗIt's designed to minimize the load on the motor caused by the spring torsion.
āŗThe base and the two wings are shaped in one-piece form to make a high durability.
āŗThe Rotary Shaft design makes the spring effectively spring back.
āŗIt fits in with any spring from stock to M170.
