range of KN interactions is determined by vector meson exchange. In equation (\[a9\]) for $G$ the range of interactions enters twice, first as a cutoff at small distances and second in terms of the form-factor $v(k)^2$. We find in a numerical way that these two effects cancel and $fG$ is very stable within the range $ 3< \kappa < 6 ~fm $. As the KN interaction range is very short, but finite, the uncertainties related to the actual value of $\kappa$ are additionally eliminated by the short range repulsion in the NN systems. This yields an important stability in the few-body calculations described here.

With nucleons fixed at a distance $r$ the eigen-value condition determines $ p(r)$ which in turn generates the potential $V_K(r)$ contracting the NN system to a smaller radius. The form and strength of this potential depends on the form of the kinetic energy. In the KN C.M. system the $  E_{KN}$ energy is given by $ \sqrt{M^2 +p^2 } + \sqrt{m^2 + p^2},$ where $m,M$ are masses of the meson and nucleon. The same form is kept in the large nucleon mass $M$ limit. In the few nucleon systems the non-relativistic form of the nucleon energy 