Cargo tube/seat tube junction.  I added a gusset to spread the load and because my cargo tube was 1mm short and I didn't want to remiter the top tube.
Downtube/BB junction.
Head tube/cargo tube/downtube junction.  There is a lot going on here.
The frame is brazed together.
Head tube/cargo tube junction.
Head tube/cargo tube sub assembly.
The head tube and cargo tube have been mitered and are mounted on the front triangle fixture along with the donor frame.
The miter has been cleaned up a bit with files and the head tube fits nicely.
The cut is made.
The miter has been cleaned up a bit with files and the head tube fits nicely.
The miter has been cleaned up a bit with files and the head tube fits nicely.
The miter has been cleaned up a bit with files and the head tube fits nicely.
See photo in original gallery.