Many kits come with ca hinges now, but my vote is for the hinge points. They may take some extra care during the install vs a ca type, but in my opinion you end up with a truly hinged surface. CA hinges seem too springy and stiff feeling. Why make the servos work anymore than they have to? I suppose pinned hinges would do pretty much the same thing, but I've never used them - although I have a drawer in my organizer full of them, can't figure that one out.

Dan