I had an 81 in a 45 in Yorktown and I got off with speeding as my first ticket. First off get a lawyer and take the Driver Improvement class, also go to the DMV and get an Official Driver Transcript showing your driving record, since it is your first ticket it will be A+++++. In doing this you are exhausting all your resources to get out of this ticket and so all your cards are out. The speedo check is not a great idea unless you have a lot of money to actually replace that stuff. If you go to a judge and show your speedo was off by a lot (in reality) you would have to spend quite a bit to fix your calibration of your speedometer to match your car. Good luck!!!!