Affixing the upper frame simply by pressing allows correct alignment by aligning the center of the frame and the cap.
The cap curves according to its natural curvature and allows the original shape to be retained without any distortion or scratches after removing the frame. With the old frame, the brim bends or changes shape due to it being secured with a brim clamp. Because of this, people who use the old frame may find that the brim does not return to its original shape even after removing the clamp.
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