Engineering First, Handwork Second.
Hours are spent programming the CNC router, after endlessly designing the frame in CAD. Still, the CNC router can only do so much. It's not exactly the "silver bullet" in making a wood bike. There is still a lot of handwork involved in the building process. Engineering is only half the game; the other half is being skilled in putting your hands to work in shaping the frame exactly how it should be shaped.
For me, the framebuilder, this is also the most fun part. Yes, the CNC takes care of the majority of shaping, but the shapes and curves still pop out after running sandpaper over them. It's really like seeing the bike come to life.