I can't seem to find an answer to this in anyone else's post, so here goes... I want to create an axis in a part model that will be used to define some of my part's geometry. This axis is supposed to represent a rotation point in an upper-level assembly, so I want it to be obvious/easily-visible to anyone else that opens this part. Currently, it seems like I only have two reasonable options to define its location:

1) Draw a line in a 3D sketch and dimension it from the Origin.

2) Create extra reference planes/points that will be solely used for setting the axis' location.

I want the axis to be prominent in the feature tree so I don't want to bury it in a 3D sketch, and it seems silly to have to create reference geometry only for the purpose of defining other reference geometry. What I would really like is to be able to define this axis at a set distance from the Top/Right/Front planes that are already in the model. Is there really no way to do this, or am I missing something?

To any Solidworks devs out there, would something like this be difficult to implement?

Or, instead, adding the ability to offset the axis in the "Two Planes" option rather than forcing it to be at the intersection of the planes.