* Delete 1 Part 30389b Light Gray Hinge Brick 2 x 2 Locking with 1 Finger Vertical and Axle Hole (+ Shape)
* Add 1 Part 30389c Light Gray Hinge Brick 2 x 2 Locking with 1 Finger Vertical and Axle Hole (x Shape)
Comments from Submitter:
Source = sealed parts bag from set. Likely true of 4478-2. I don't think there is a light grey with a + as a known colour.