can't import radius dimension on drafted wall

I'm sure I'm not the only one struggling with this.  I have created a cut from the top plane down with draft included in the cut feature.  The face cut is parallel with the top plane.  I then added a radius feature using the vertical edges created by the cut profile.  Why can I not import this model dimension into the drawing?!  I obviously can't add a reference dimension to this because the actual geometry edge created from the radius as seen in the top view is an ellipse.  So how do I dimension this??? The only thing I can think of is to add a custom property with the value that I want, create a global variable linked to the property, and then link the dimension to the global variable.  I can then add a note which references the custom property to get the proper value.  This seems a tad insane however.  Anybody have a fix that I am overlooking?

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