* Change 4 Part Light Bluish Gray {2453 Brick 1 x 1 x 5 (Undetermined Stud Type) to 2453a Brick 1 x 1 x 5 - Blocked Open Stud or Hollow Stud} {Alternate to Regular}
* Change 4 Part Light Bluish Gray 2453b Brick 1 x 1 x 5 - Solid Stud {Regular to Alternate}
Comments from Submitter:
See change log, part 2453a (2453 at that time) was added as an alternate to 2453b.