revised 7/ 2017
..The gluing edges of the two halves of the back plate are blackened with a permanent marker pen to show progress in fitting the joint.
..Using 90 degree fence with my belt sander to begin refining the gluing edge.
Now I am sanding the bottom surface to make it flat. This bottom surface, where the glue joint to ribs will be, becomes a finished surface.
...Notice the progress on the first half being worked on towards flatness...
The process continues until the black is just all removed from the wood surface.
Now the other side is to be started on...
..Although Opus # 29 has both plates one piece; the top plate quartersawn, with 198 Wood Tone and # 22 Rub Tone; and the Back plate French Maple of 242 Wood Tone and # 22 Rub Tone; most violin plates are made up of book matched wood glued on the center line to make it wide enough to form a violin plate.
..So this approach is covered now: