Yes, by George I think you've got it. You had my head spinning since there are so many ways to think about this stuff. grin

To move a major scale up a half step (C to C#) every note in the triad moves up a half step and likewise to move the scale down a half step every note in the scale goes down a half step (C - Cb). Then, just like you did you have to clean up the accidentals. for example. (F## = G).

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