On Tuesday, June 9, 2015 at 8:48:43 AM UTC-7, Lloyd E. Sponenburgh wrote:
"Lloyd E. Sponenburgh" lloydspinsidemindspring.com fired this volley in
. 4.170:

To clarify that, the wings are cut with relief, but also are not parallel
to the axis of the cutter shaft. So 'fiddling' it to a proper fit in a
micrometer would be a bit troublesome (about like measuring a dovetail
slotter).

What I ended up doing, with a new dovetail bit, was making a test cut
and putting the chunk of wood under a measuring microscope.
It was possible to get X-Y coordinates of the cut profile, and
size and angles all came out in a blizzard of math...