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<For Perfect Binder-D1>
2-4) Remove the Dust stopper unit. Then install the new type Dust stopper unit.
2-5) Reassemble the parts in the reverse order from step 2-4)
2-6) Check sliding failure in step 1) to see whether the sliding performance has improved.
[Countermeasure cut-in serial numbers in factory]
Perfect Binder-B1 US CVZ00172
Perfect Binder-B1 EU GZK00064
Perfect Binder-D1 US QWS00001
Perfect Binder-D1 EU QWT00001
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