Why would a $75 ticket be worth the expense of a lawyer?

It's not.. haha..
I'm going to court anyways to get out of my exhaust ticket (don't argue with that one, I have a way of doing it, done it before) and since i'll be there already I really want to fight this.. I think with the defense I've posted so far, it should be dropped..
anyone in here have a lot of experience in traffic court? i'd like to talk to you to find out how it works, I haven't been in years and forget the order of things