Currently, the standard explanation for inertial mass is the higgs field, which gives particles their mass. Many of the SM's undefined parameters involve interactions between the particles and the higgs field, as well as the mass of the higgs boson itself. Sundance preon braiding has twists representing charge, 1/9 I believe, and i wonder, if his model is physically correct, could electric charge play the role of inertial mass independent of the higgs field. All particles of the SM have twists which carry electric charge, except the photon, so could an electric charge in an electric field behave as though it has inertial mass, thus obviating the need of a higgs field for mass generation. (Whether preon braiding obviates the needs for a higgs field to break E-W symmetry is a separate issue entirely).