sweep has a nice set of and quarter and mid points

Fusion loft shows 2 points at random positions

so it would be great if in addition the user could snap to existing fit points so that I can position
the loft spline accurately where I want it to be
https://drive.google.com/file/d/0Byzv_NlyKp_2eVZpTkNzTkhlZGM/view