Because the previous dga parent did not randomly generated nontoxic fitted-children with any of the long alkyl-chains characteristic of natural lipid molecules, a two-step strategy to explore such possibilities was designed. For the heads-only first step, dga co-evolutions were made by maintaining its alkyl-chains constant, and varying their heads. For the alkyl-only second step, the best tophead non-toxic fitted-child predicted from the first step, was maintained constant while their alkyl-chains were DW-BEL varied into their grandchildren.