* Add 4 Part 3001old Black Brick 2 x 4 without Cross Supports (match ID 6)
* Add 2 Part 3001old Red Brick 2 x 4 without Cross Supports (Alternate) (match ID 7)
* Change 4 Part Black 3001 Brick 2 x 4 {Regular to Alternate} {match ID 0 to 6}
* Change 2 Part Red 3001 Brick 2 x 4 {match ID 0 to 7}
Comments from Submitter:
Black and red bricks 2 x 4 no. 3001 (with a central stud cross support) are included in my 7740 that I have owned since 1984 (so a late version), but in the first production runs the black and red bricks 2 x 4 were without cross supports (no. 3001old).