As someone who's currently in Missouri, I can assure you that Brunner has the most signs and ads, including radio. He will win, while Kinder will either severely over perform or under perform. Kinder is either under fifteen or over twenty five.
Seen/heard any Kinder signs or ads? IIRC, he started off with an early lead in the primary last year, and a small edge in the general. Then, he just went downhill. I guess he thought he was a shoo-in, it seems like he didn't do much campaigning until it was (probably) too late. I was originally rooting for him, but last month I switched to Greitens, who I think, is the best candidate.