ah, yes that makes sense. I tried to understand how you could get errors trying to access an empty reference, while at the same time that reference was accessed without issue in another part of the graph. There being two different reference variables solves that problem 
Glad it works without errors now.
Looks awesome! I’ve been meaning to add Unreal’s default VR movement to my VR example map, like you have in the video. Happy to see someone is using the VR features of the toolkit 
I own a Vive and want more VR TBS games!