Evolution of an isolated halo as a function of time for two different choices of N_ngb. The upper panel gives the mass enclosed within 10 pc and the lower panel displays the energy conservation as a function of time. The choice of N_ngb = 384 corresponds to twice the kernel size compared to the SIDM computations for N_ngb = 48. Table A.1 gives the parameters employed for the displayed simulations J and K.