Fun read, there are some good points in here, but in reality you got lucky the cop didn't show. Arguably, yes the other plantiffs should have been smart enough to see it, so fair point. You can argue you were ready to pick fight, but its just bench racing after the fact. Not to say you shouldn't, but understand the difference between a win based on merit and a win based on luck.
The 'do your research' thing is a good point. If you find reading case law decisions secretly interesting like I do (mainly to find the flaws in the logic), there are a variety of notable judgements available online through public records. As a STEM person, it is both interesting and insanely frustrating to see some of these judgements. Remember, logic and reason only apply to those who have logic and reason to begin with. A fellow STEM person might, but traffic court is not full of them. Typically these cases merely reference existing cases and try to put a square peg into a round hole. Some of these judgements are quite alarming. Cops calibrating radar guns completely out of spec, generalized extrapolation (one radar gun is accurate so they all are), lack of evidence basis, who said what without proof, etc.
Also keep in mind a previously reduced ticket can be restored to it's original value, but unless you have real grounds, its not always the worst bet, if you don't have a solid angle. The point is, acquire the evidence against you and, do your research. Do not use those generic discloure forms. Ask for the moon. Certificates, qualifications, date stamps, equipment logs, serial numbers, manuals, etc etc. It will take you weeks or months to mount a credible challenge, but you need a thread to pull on to start. Simply going in guns blazing isn't always the answer.
It's quite the opposite of engineering where the evidence dictates the result, in court, determine the result first, then find the evidence/line of questioning to get there. Never ask a question you don't know the answer to.