Nice work on the restore. It seems it is pretty common for these 1305 to chip. Mine had the same issue last year, and I ended up doing something similar to what you've done.
Wow that looks incredible. GREAT job. I used mine tonight with some Body Shop Maca Root Shave soap. I had so much lather, I couldn't believe I EVER contemplated parting with this brush. When it's running well, this is my favorite brush to use now.