* Change 1 Part Blue {3684 Slope 75 2 x 2 x 3 - Undetermined Stud Type to 3684a Slope 75 2 x 2 x 3 - Hollow Studs}
* Change 3 Part Light Gray {3684 Slope 75 2 x 2 x 3 - Undetermined Stud Type to 3684a Slope 75 2 x 2 x 3 - Hollow Studs}
Comments from Submitter:
Systematic changes for new catalog part.