Extension being ground clean, I think.
Unfinished fillets.
All photos courtesy of builder, Tony Pereira of Pereira Cycles. His Flickr site is here.
For earlier build-up photos and my reaction, see Frame takes form...beautiful, curvaceous form.
For an earlier visit to Tony's shop for a fit and such, see My randonneuring Bicycle, Part 4, Let the Build Begin!
For more posts about this buildup, choose the "custom bicycle" topic in the right sidebar.
Keep it recorded,
CurioRando