Be aware that you might have to file down the 404 to get it to fit well. I usually remove the screws and file the inside of both halves with a flat file. Then I mount it on the mouthpiece with an old reed and tighten the screws. Use another old reed to shape the lig to your reed's contours. Once adjusted like this, the ligature doesn't need much pressure to hold the reed in place and will not slip on your mouthpiece.
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