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?

My new Twsbi Eco EF nib is sliding as I'm writing, and I have to

PILOT CUSTOM 823 - Plunger Type/Transparent Brown

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

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

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Unboxing One of the Most Anticipated Pens of 2023 - Twsbi Limited

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My new Twsbi Eco EF nib is sliding as I'm writing, and I have to

Dairy Of A Wimpy Kid: Strike Out PG 5-6 : r/LodedDiper

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