I recently picked up a Twsbi Kai, but I noticed that the section where you grip the pen is loose. It wiggles, and I am not sure how to fix this problem?

The Most Durable and Reliable Pen? Also, the TWSBI Kai

edjelley.com - Fountain Pen, Ink, and Stationery Reviews » Weekly

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The Most Durable and Reliable Pen? Also, the TWSBI Kai

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Pen Reviews, The Passionate Penman

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