Creo models have been made of the base cube and model pieces.

Figure One: Closed Cube

Figure Two: Open Cube

Figure Three: Turning Piece

Figure Three: Straight Piece

The pieces would fit over the pegs on the cube, similar to the way a Lego works. The pieces will have a transparent covering to keep the ball bearing in place.

A locking mechanism has been designed.

Figure One: Locked (Left) and Unlocked (Right)

When the ball reaches the maze completion point, it enters a hole so that it triggers the latch so it displaces.  The latch moves and lets go of the door, as seen in figure one. This allows for the ball to move past the latch and exit the chute.  The door will lock itself again once the door is shut.