The top must now have the heelblock and endblock glued in before the sides can be glued. These blocks are made from Mahogany.
The sides are so thin that they do not have sufficient surface area to provide for a good join to the top and back. I glue in Mahogany kerfing where the sides meet the top and back and this will provide for a sufficient gluing surface.
Now back to the top to prepare it for gluing to the sides.