Hi Frenchy,
When I say "pretty close" I am speaking about "matching the curve that already exists"... from the original model.. The last video was just showing a method to have the fillet work in this particular case. (no need to watch me sit there for 5 minutes trying to "match his curve")

If you were building a "precise airfoil", you would probably incorporate the conic tool with blend.

These old models are being made by "guys tracing bitmaps", so no such thing as precision or exact.. I think the true design would have "precise plotting" of everything.. Not just sketching.