I still need to read all the previous posts. I admire the project. Thanks for posting.
Regarding Pro Mazda: This past Saturday my wife & I went catch the Pro Mazdas @ Nola MSP. We were out of the house about an hour to see 1 race and the weather was perfect. If there were 15 spectators that was about it. It appeared everyone else was closely associated with a team. Of course it was the winter series and not advertised locally. Next time I know they are coming I will put the word out.
November 15-19, 2017
Las Vegas, Nevada
SKUSA SuperNationals 21
2018 Events TBA