Sliding dovetails are used to connect the arms and neck, very tricky to line up but I have done it many times now enables me lots of room for adjustment. have connected the fingerboard temporarily with animal glue.
Here the top is re-attached using animal glue, not the use of wooden location pins
to ensure line up before final sanding.
after final sanding and scraping, I apply the undercoat of linseed oil(boiled) The picture is after several coats of linseed oil applied over a week.