We show that our fully-polarizable KS-DFT/AMOEBA implementation successfully prevents electron spill-out and performs wave function optimizations when using the covalent radii as damping factors for a modified interaction tensor. We summarize how those parameters affect the SCF convergence, QM/MM interaction energies, and molecular dipoles, and we point to possible shortcomings of our model. We conclude the article with implications of our new model and future perspectives for further development and applications.