Communication: Two new phases for the metallic salts based on 2,5-bis(1,3-dithiol-2-ylidene)-1,3,4,6-tetrathiapentalene have been prepared and shown to exhibit metallic conductivity down to low temperature. The organic slab topology and band structure are identical to previously determined 2:1 salts of the same donor with smaller monoanions-only the Fermi surface (see Figure) is modified by changing the anion volume and charge.