When defining the direction of a linear pattern in assembly, I would prefer to use one of the default planes (FRONT, RIGHT, TOP) to set the direction. However, I cannot seem to be able to select the plane so I have been using an edge on one of the parts that is perpendicular to the plane.
I have found this practice (using an edge) to be bad, since the edge might go away or be split or otherwise change in the future -- then the pattern will fail.
So my question is: Is there a way to select a PLANE to define the direction of an assembly pattern? If not SHOULD THERE BE? Are there other good solutions to this?