Various techniques have been developed that provide some improvement to the numerical stability in the time-dependent case, without the need to invoke additional, sometimes costly, computational smoothing procedures such as those mentioned above, nor supplementary approximations for the quantum potential and for the quantum force. Rather, the "tricks" used here are in the vein of a judicious choice of boundary conditions and finite difference discretizations, and are therefore numerically exact. Curiously, the particular choices made here can be interpreted as determining the precise form of the "interworld potential"-according to the "discrete" many-interacting-worlds (MIW) interpretation of quantum mechanics that has sprung up from the trajectory-based reformulation. In the original, "continuous" MIW interpretation, however, these are merely choices for the numerical discretization.