I ran NESBA years ago. The event was well run and I had fun. Recently I had a number of friends at a NESBA event at Road Atlanta and they had some issues. Something about running with, or without a kink? A different configuration then all the other motorcycle orgs. Apparently is caused some kind of safety issue that instigated a couple accidents. Since I wasn't there, I'm not sure. I believe this is the event Gixie is referring to. But overall, I think NESBA is one of the better organized, and structured track day organizations. In my experience.