We cannot optimize CG structure in the Q I phase without an existing atomistic structure. However, we note that the Q I structures for amphiphilic molecules are likely to behave locally like bilayers, with some changes to stabilize the additional curvature, and we can easily build stable bilayers at both resolutions. Thus, the appropriate monomer parameterizations for Q I phases at both resolutions should, to a first approximation, form stable bilayers at appropriate concentrations, justifying the approximation of fitting to bilayers. We therefore first utilized information gathered from atomistic bilayer simulations to guide the selection of Martini force field bead types to correspond with the different chemical groups in our monomers.