AutoCAD Inventor :: Dimensioning To Central Axis Through Multiple Sketch Planes

I am creating a part that consists of a series of intermediate Lofts.  The various Loft termination profiles are sketched on a series of stacked planes, most of which are parallel to one another.  I have a Work Axis (oriented at an angle off of true vertical) that penetrates all of these sketch planes, essentially forming a "central axis" for my part.  Most, but not all, of my sketch planes are normal (perpendicular) to that axis.

I want to use my "central axis" as a reference point in each of my sketches, i.e., the point where the axis intersects the sketch plane.  I am having a minor difficulty.

When I project my central axis into a sketch whose plane is normal (perpendicular) to the axis,  Inventor displays a reference point where the axis penetrates the plane and I can dimension my sketch geometry relative to that point.  Conversely, no such point is displayed when I project the axis into a sketch plane that is NOT normal to the axis.

Is this correct behavior?   To have a dimension able point on my "non-normal" sketch planes, must I create explicit Work Points to mark the intersection between my Axis and such planes, and then project those points into the related sketches?