The back plate here is getting its final scraping to bring it to my desired thickness. This process was pretty much done before jointing, but a further millimetre or so was removed, first with a toothed blade in a small plane, then with the scraper.
Here the concave workboard for supporting the belly while attaching its struts is in the first stages of being carved. First a template of the desired long arch was made, then a plane was used to create that arch on the plywood. The next shot shows the development of the shape with a small flat plane working mainly at right angles to the centre line to create the cross arched profiles. For the back, the maximum convexity of the plate is only about 3mm. The belly and the back each have their own workboard. A template was made for a major cross arch as well as the long one, just to make sure the shapes were true...the rest was done by feel.