I wouldn't bother if its loss of licence, cop what you are dealt. A Magistrate will want a pretty good reason for you to be speeding that much. If you decide to go to court don't bother with a lawyer, represent yourself. Admit you are guilty straight up. The best the Magistrate will do is reduce the fine amount. Demerit points cannot be altered by a Magistrate as it is not his/her area, its the Road Authority. In my experiences if you try to blame the cops, the system, the radar equipment etc you will get hammered. If you accuse the cops/system of harassment/racism etc you will get hammered.