I have indicated how reluctant I am to post pre-completion pics of the wrongko project, but David felt that it would be good, so I respect that.
This pic shows how far I have come. The blade goes in deep enough, the fit is satisfactory. The wood is a bit difficult to work with; I have used various tools to reach this stage. From here on it will be carving knives and files, then sandpaper. (The angle grinder's work is done!)