That adze is so interesting, it got me looking around at other examples. And also inshaves, now that you’ve mentioned it.
One of the differences you see, in both adze and inshave, is whether the blade geometry has a flat—like you talked about on your adze—or whether it’s a segment of a circle. For example, a fellow named Richard Grell, also a Windsor chair maker, makes an inshave with a flat section. Maybe Jason’s will have that also.