Rough arching of the back part III

I used a router after all. And got the confirmation that I don't really want to do that too much. But maybe it has it's place. I used to it to create a clear edge of well defined thickness around the back to help with the manual work. After the edge had been created I used again a gouge and plane to remove material from the back.

It is interesting how different the experience of using a router is. Almost a violent operation with no consideration for the characteristics of the wood.