djs wrote:

Well, this make some sense, a flat surface around the entire edge of
the sole, and hollowed out in the middle by about 0.001. Are you sure
that the slightly hollow is 0.001 inch. How did you measure that? I
am wondering how I might put such a feature on my plane.

ah, buy a LV plane? g I don't know any simple method of
accomplishing at home, what LV does to the sole of their planes.

Dave