Please refer to my progression in the attached image. I know the lines themselves might not be too interesting or strong, but, for the time being, I just want to make sure that the chords are well-voiced. In particular, I would like to know if there is anything that I should be aware of when working with the accidentals that occur as part of the modulation to and from C major. For example, I know that (in some cases) it is best to keep chromatic progressions in a single voice to avoid cross relations.