FreeCad - Create A Ring Using Curve WB and Surface WB 

Welcome to the channel!

I do have tutorials about mixed curve and freehand bspline, just use curve WB, no macro. You can check them out

@@DuyQuangDang Yes, sure I did. I have almost all you videos, and the last ones are really very useful (the key you press or the mouse action, , particularly. ...) - But existing a 3D spline (an FH, or a Mixed curve), it's not so easy to find the intersection of this spline with a sketch on which you are working on .... With a line, you get sometimes a point, more often the projection of the whole line, but with a B-spline, generally, what you get is the projection on the sketch of the whole B-spline, when the unique point of intersection is what I need for the precision of the model .... It's a a real lack of FC, imo I just discovered too the Silk WB, which seems also very powerful, but as often with FC, not so much user-friendly ...

I just updated the info, will take a look at it!

@@DuyQuangDang Ok, thanks, I'll do