Using the unofficial Leap Motion plugin, how can I get an actor to follow the hand?

So, I’m using the most recent version of the unofficial plugin, and I would love to be able to get an object to attach to the hand of the player character when pinched.

http://i.imgur.com/QkWvJ4c.png

So the above image is my Blueprints Setup so far. I’ve used Get Player Controller, set the socket name, and have it set up to grab for now, rather than pinch, for easier testing.

By using Keep World Position, I am able to allow the cube to move when the character does, but not the hand.

How can I fix this?