The ribs are built on the mould created from the outline taken from the poster. First blocks are lightly glued in place at the corners, neck and tail. These are then shaped back to the pattern of the outline. From here the ribs, reduced to 1mm in thickness and bent to shape, are glued in with purpose made blocks as guides. Next the linings are added to the top and bottom edges of the ribs. These are mortised at the insides of the c-bouts. The outline of the ribs is transferred to the plates to make the final outline.