  In ref. [1] we have used the Zagreb realization of Carnegie-Melon-Berkeley
coupled-channel, unitary model as a tool for extracting pole positions from the
world collection of partial wave data, with the aim of eliminating model
dependence in pole-search procedures. In order that the method is sensible, we
in this paper discuss the stability of the method with respect to the strong
variation of different model ingredients. We show that the Zagreb CMB procedure
is very stable with strong variation of the model assumptions, and that it can
reliably predict the pole positions of the fitted partial wave amplitudes.
