Does exist some limitations or precautions with these sorts of auto Intersect surfaces?
MoI manage them without restrictions?
The "auto trim" don't work is that normal ? (I suppose yes :)
The trim between surface and its generator's curve works fine :)

PS Snap grid disable
Some 2 D curves drawing with intersections a,b,c
When you move a circle by one unordinary point to the intersections a,b,c there is no snaping, but if you move this same circle by its "Quadran" there is snaping on "warm point" a,b,c !
Is that normal? :)
I am agree that is the same but for an ellipse? :)
Aaaaaaaaaah Sorry I have fogotten another time the function "Move" ! Sorry