Hey Jack,
another small BUG in your Formula Sheet.
On Stuttgart 3rd:
1. you missed the "Base No." which is 1 i suppose.
2. Your Design 4 (19, Black) hides Design 1 (23, red) <-- will not be visible
I guess it should be like this:
Design 4: 3, red
Design 3: 23, red
Design 2: 19...