Accurate diameter on SubD surface edges

Dear @Owen_Waterhouse

for fast aligning - in my example of 8 vertices:
draw some helper SubD:
_subdCylinder
with 8 arround faces
with solid on
subselect and delete, just keep the fan-style bottom.

_stitch
or
_bridge

delete the fan-style circle.

a 8-edge-polygon is already a good approximation for a circle / cylinder
16 edges with R50 mm are 0.003 mm of…

At the end of your modelling, you still have the option to
_subDivide
draw a target _subDCylinder with 16 arround faces
repeat above workflow…

@brian
I would love to see
beautify edge loop
and
SetPtPolar

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