How to ensure spline points maintain symmetry?

A quick thought about this is that you can dimension both the direction and magnitude of the points and create linked dimensions to impose symmetry. Extra work I know, but its at least a way to do it.

Yeah, I agree, this stinks. You'd think SW had exhausted all the sketching enhancements that could possibly be made with as few enhancements as it has seen in the past several years.

The only way I have found to do this is to make two splines, with the endpoints on the line of symmetry, one spline mirrored from the other. This does give you a split at the line of symmetry, but it also gives you symmetry that includes the spline handles.