  We continue our study of semi-strict tricategories in which the only weakness
is in vertical composition. We assemble the doubly-degenerate such
tricategories into a 2-category, defining weak functors and transformations. We
exhibit a biadjoint biequivalence between this 2-category and the 2-category of
braided (weakly) monoidal categories, braided (weakly) monoidal functors, and
monoidal transformations.
