Keep in mind that the inertia switch, if installed per the RF instructions, is in-line with the ground side of the RF fuel pump relay. If you bypass the RF fuel pump relay, the inertia switch does nothing for you unless you move it into the "new" fuel pump circuit. You can wire in-line with the ground on the fuel pump rather than at the relay, and it will function as intended regardless of the up-stream option you elect to use.