While this slideshow is not a comprehensive look at the build process, it does give a feel for the process that goes along with frame construction.
Establishing what your perfect bike is
A raw Sachs Lugset
Tubes and lugs are selected
Butts are located as tubes are checked
Tubes are checked for bowing
More tight mitres
Mitres are nice and tight regardless of frame type
Layout and mitres are checked
Main tubes on a fillet brazed frame are tacked
Tacking before fillet brazing
Silver Penetration
A Bottom Bracket in the Works
Note the layers showing how metal was added
 
Brazing away
The previous lug cleaned up
 
a seatstay cap in process
seatstay caps in process
Creating the tops of seatstays
Fork dropouts are filed to shape
Seatstays are tacked on a lugged frame
Fillets are filed to create a smooth transition
 
brazing the seat cluster
Campy tools are used to prep the frame
Inspection begins
Satisfied with results
Another frame going to paint
Custom stems get polished
custom stem polishing
A polished fork crown
cleaned up head tube lugs
a finished fillet brazed seat cluster
Finished head tube fillets
A finished single speed lug
Pictures are taken
 
A finished frame
The Custom Process