I bought a horse hair brush about a year ago. Try as I might I just can't abide the prickly feeling when I face lather with it. I really liked the look of the handle and it was comfortable in the hand. The only solution was to reknot it. I have a TGN Finest 2 band fan knot coming so I though I'd get a head start and steam the knot out.
Before
http://i59.photobucket.com/albums/g2...pse78f8f13.jpg
After
http://i59.photobucket.com/albums/g2...pstxne9mxa.jpg
The knot came out easily with very little clean up of the handle bore to do. I would bet you could even reuse the knot. The handle bore is a hair under 24mm and the incoming knot is 22mm so that should work out just ticky boo. Looks like the loft will be 46mm using the original handle bore depth which should work just fine also. Fingers crossed it all works out as planned.
Bob
I make no claim to being a brush maker so if it is in the wrong forum please move it.