Embedded Element Array with Inf Gnd Plane

The example below shows how to perform an embedded element analysis of a particular array:

Modeling Mutual Coupling Using Embedded Anaylsis

My problem is that I would like to rework this example, adding an infinite GND plane. This becomes an issue, since the Tilt/TiltAxis methods in Antenna Toolbox arrays cannot be used on a model with an infinite GND plane. Additionally, the CustomAntennaElement class assumes an element normal vector that does not coincide with the broadside pattern that I desire. This means that when you put the element into a phased.URA the elements are not oriented as in the Antenna Toolbox full-wave broadside array.

Is there any way to accomplish addition of an inf GND plane to the above example? I've tried rotating the CustomAntennaElement pattern, changing the embedded array's ArrayNormal property, and changing the elevation angle domain. None of these seems to work.