GraphicsRayCaster and VR controller

Hi,

I'm trying to leverage the Unity GUI system by adding a GraphicsRayCaster to my VR controllers.

As I understand it...
GraphicsRayCaster - necessary to track hits on uGUI.

PointerEventData - necessary to trigger the typical mouse events.

The thing is, I want the GRC to work on a controller, not the headset. And the PED looks like it requires knowing where the GRC is hitting, in order to work.

So, do I do a Raycast from the GRC, then get the results, then convert that to screen space, then assemble the PED and do a SECOND Raycast with the GRC + PED combo, in order to make this work?

Otherwise, I don't know where the GRC is hitting, in order to populate the PED with the 2D screen location.

Any and all suggestions welcome and encouraged.

-Chilton