My first project was to replace the knot on a stock VanDer Hagen brush. Although not a "looker", the new brush has been totally awesome, and I have been using it daily for the last 4-5 months. Since I recently completed a Titanium handle for my first GD project, I decided to make a new Titanium (6al-4v) handle for a second Silvertip knot from The Golden Nib.com.
From left to right: (new 24mmx58mm Short Loft Silvertip knot, my modified VanDer Hagen brush, the Omega boar 31064 "banded" model, and Omega boar #49):
Here is the Titanium bar I used for this project:
I started by smoothing the OD and face-off the Ti bar with a PCD insert:
I then proceeded to very slowly work on the shape - it took me between 4-5 hours to do all of the machining today:
I added some internal grooves to provide mechanical lock to the epoxy (the knot can't slide out):
Then the assembly (the easy part!):

Compared to my other shaving brushes (Ti handle=5.1oz, VanDer Hagen=2oz, Omega boar=2.7oz):
And here is my Titanium pair:
From left to right: (new 24mmx58mm Short Loft Silvertip knot, my modified VanDer Hagen brush, the Omega boar 31064 "banded" model, and Omega boar #49):
Here is the Titanium bar I used for this project:
I started by smoothing the OD and face-off the Ti bar with a PCD insert:
I then proceeded to very slowly work on the shape - it took me between 4-5 hours to do all of the machining today:
I added some internal grooves to provide mechanical lock to the epoxy (the knot can't slide out):
Then the assembly (the easy part!):

Compared to my other shaving brushes (Ti handle=5.1oz, VanDer Hagen=2oz, Omega boar=2.7oz):
And here is my Titanium pair: