* Add 1 Part 4073 Trans-Red Plate, Round 1 x 1 Straight Side (Extra)
* Delete 3 Part 4073 Trans-Red Plate, Round 1 x 1 Straight Side
* Add 1 Part 4073 Trans-Yellow Plate, Round 1 x 1 Straight Side (Extra)
* Delete 3 Part 4073 Trans-Yellow Plate, Round 1 x 1 Straight Side
Comments from Submitter:
Neither the main set or alternate model use 3 of either part. 1 of each must be extra.