  Korff and Stroppel discovered a realization of su(n) affine fusion, the
fusion of the su(n) Wess-Zumino-Novikov-Witten (WZNW) conformal field theory,
in the phase model, a limit of the q-boson hopping model. This integrable-model
realization provides a new perspective on affine fusion, explored in a recent
paper by the author. The role of WZNW primary fields is played in it by
non-commutative Schur polynomials, and fusion coefficients are thus given by a
non-commutative version of the Verlinde formula. We present the extension to
all Verlinde dimensions, of arbitrary genus and any number N of points. The
level-dependence of affine fusion is also discussed, using the concept of
threshold level, and its generalization to threshold weight.
