First off, how is it possible to get 6 points for 65 mph?? Were you in a 20 mph zone or something? What did he actually clock you at?

Six points is no joke, your insurance company will not ignore that. Plus, you get another 6-pointer like that and you're close to suspended-license territory. I would get a lawyer at this point. The jurisdiction defense may or may not be valid, but these traffic judges will do as they please. So unless you get a competent lawyer who knows that specific court and knows that specific judge, it may not matter. The written appeal is a real long shot, I would get a lawyer and try and get the points reduced that way.