SubD Box Mode Snaps

I notice when in Box Mode for SubD, the only Osnap that appears to work is Mid (when using InsertPoint). I would like to use End and Near working with the Box Mode control points/geometry.

The only way I’ve found to accomplish this is the rather clunky duplication of the edge/face in question, and snapping to that.

Even intermediate NURBS/curves don’t allow me to select a SubD vertex/edge/surface in Box Mode and move it to an Osnap on said NURBS.

Is using non-Mid Osnaps while in Box Mode even possible?

Hello - the snaps are basically what you’d get, in Rhino, on a mesh - Mid, and Vertex, Near, if snapping to the object itself; end etc works if you snap to other non-mesh objects.