The soundboard is glued onto the box, and then secured with covering strips which are themselves glued and screwed...and these are covered with thin strips of matching wood to cover the screws.
Creating the final surfaces for the fit of the neck and pillar to the soundbox is a job best crept up upon rather than attacked with bravado. Rick recommends leaving a small allowance for the movement of the neck wood after compression by the strings, and I have done that, but I needed to be very careful that the slight gap was even enough for the surfaces to bed down without any sideways twist. At this point the top joint is held in position by a pair of positioning dowels, and the bottom joint is just hanging there. When all is well-placed, the bottom end will be secured by a stout coach screw into the base.
It looks as though this instrument will be finished with oil in the timber, rather than coatings over the top. The surface will be less perfect in that wood flaws and surface variations won't be masked, but the timber itself has such authority and integrity I'm not sure I have the will to wrap it. The exception to this is the sound-board, which has had a couple of sealing coats of shellac. Softwoods can look gooey if oiled, and have been known to drink far too much.