Is there sufficient space around the ferrule that you could use a during to inject glue? Either a thin crazy glue (try nail glue as it's meant to get into small spaces via capillary-type action). Or try thinning a little gorilla glue. Or could you work a little plasticine in there to fill the gap?I'm assuming you would want a wash brush - they have a softer edge. Flats or even brights will have a more defined edge. I have a not-expensive wash brush, at least not $226 on sale, that sounds kind of like yours. Don't have it at hand but can check it out when I have a chance.Or call a knowledgeable store - such as Cornelissen in London. They have their own line of brushes. They are not a catalog store and carry only painting supplies and pigments - looks like a shop in Diagon Alley (Harry potter). I would trust their advice. Or try Paper & Ink Arts or John Neal Bookseller. Both have knowledgeable staff.
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