* Add 2 Part x138 Black Rubber Band Extra Large (Square Cross Section) (Extra)
* Add 1 Part x137a Black Rubber Band Medium (Square Cross Section) Thick Cut (Extra)
* Change 1 Part Black {x137 Rubber Band Medium (Square Cross Section) Thin Cut to x137a Rubber Band Medium (Square Cross Section) Thick Cut}
* Add 2 Part x138 Black Rubber Band Extra Large (Square Cross Section) (Extra)
* Add 1 Part x137a Black Rubber Band Medium (Square Cross Section) Thick Cut (Extra)
* Change 1 Part Black {x137 Rubber Band Medium (Square Cross Section) Thin Cut to x137a Rubber Band Medium (Square Cross Section) Thick Cut}
* Add 2 Part x138 Black Rubber Band Extra Large (Square Cross Section) (Extra)
* Add 1 Part x137a Black Rubber Band Medium (Square Cross Section) Thick Cut (Extra)
* Change 1 Part Black {x137 Rubber Band Medium (Square Cross Section) Thin Cut to x137a Rubber Band Medium (Square Cross Section) Thick Cut}
I have some additional confusion about this set. The part count matches the
box, but there are extras in the set not used in the models. I was initially
alerted when I was 1 short on 1 piece and I checked the instructions and found
that it didn't need the missing part. I checked one more also before noticing
that the part count was "correct".