I don't mean to be rude (and I do wish you luck getting the ticket thrown out), but this seems moot. There is no way that the officer clocked you at 81 when you were actually doing 30. Even if he or she over-estimated your speed by some 50%, you would still be going 54 at the time - which is 80% over the limit!
At this point, I would look for leniency (pay the fines keep the license) and or hope the officer doesn't show.
In any event, good luck.