* Delete 1 Part 30237 Dark Bluish Gray Brick, Modified 1 x 2 with Clip (Vertical Grip) (Undetermined Type)
* Add 1 Part 30237a Dark Bluish Gray Brick, Modified 1 x 2 with Split U Clip Thick (Vertical Grip) (match ID 1)
* Add 1 Part 30237b Dark Bluish Gray Brick, Modified 1 x 2 with Open O Clip Thick (Vertical Grip) (Alternate) (match ID 1)
* Delete 1 Part 30237 Dark Bluish Gray Brick, Modified 1 x 2 with Clip (Vertical Grip) (Undetermined Type)
* Add 1 Part 30237a Dark Bluish Gray Brick, Modified 1 x 2 with Split U Clip Thick (Vertical Grip) (match ID 1)
* Add 1 Part 30237b Dark Bluish Gray Brick, Modified 1 x 2 with Open O Clip Thick (Vertical Grip) (Alternate) (match ID 1)