As an aside, I disagree with the idea this is bad GD&T, knowing nothing about the part. I can see that curved surface resting on another curved surface, with the rails being there to begin creating a flat base. Fuselage, for instance.
In a case like that, the surface is absolutely the correct primary.
if this were the case there should be some target points that this user could then iteratively align to
As an aside, I disagree with the idea this is bad GD&T, knowing nothing about the part. I can see that curved surface resting on another curved surface, with the rails being there to begin creating a flat base. Fuselage, for instance.
In a case like that, the surface is absolutely the correct primary.
if this were the case there should be some target points that this user could then iteratively align to
