  We identify the kinks of a deformed O(3) linear Sigma model as the solutions
of a set of first-order systems of equations; the above model is a
generalization of the MSTB model with a three-component scalar field. Taking
into account certain kink energy sum rules we show that the variety of kinks
has the structure of a moduli space that can be compactified in a fairly
natural way. The generic kinks, however, are unstable and Morse Theory provides
the framework for the analysis of kink stability.
