Fingerboard and Saddle
Trim tongue to fit neck.
Cut back with fine saw, then with knife, then sand to finish.
Thickness should be 5 mm, and flat.
Length of tongue/neck should be 12 mm.
Plane fingerboard to fit neck. 23 mm at narrow end, 32 mm at other.
Thickness should be 5 mm.
There should be a 0.5 mm difference between left and
right heights from body to top of fingerboard edge.
Cut out space for saddle - ~36
mm wide (to fit) and down to top of rib.
Leave it for a loose fit.
Saddle
should be 7.5 mm total height 
Glue saddle into place.
Tack fingerboard into
place.
Glue nut to end of fingerboard.