Same as Fig. 24 but showing the overall abundance structure at large times as a function of mass coordinate (top) and expansion velocity (bottom). It is very similar to the subluminous model for SN 1999by and consistent with the chemical structure based on our abundance tomography given in Table 3. In addition, we show the initial ⁵⁶Ni → ⁵⁶Co → ⁵⁶Fe at the time of the explosion (purple dotted line).