Thanks, Will. Perhaps, and evidently, Cruck Creep is horizontal not vertical, as this one is creeping into Vermont.
Have you see how a band saw can cut the inner and outer curves as well? It is tricky coming out of the curve or going into a rise cut, as the leading cutting edge of the band wants to cut straight but with careful attention it can be done on shallow curves. I feel it puts some stress on the band, I use an older band. The surface still needs a little hewing for aesthetic reasons. No jig here, free hand.
https://www.youtube.com/watch?v=I6NBYTBFDgM