Just got mine last week and finally joined the club. I think it's one of the most beautiful games out there. Regarding air balls; yes! I had that happen when I first got the game. The Ringmaster assembly needs to be flush with the play field. There is good instruction in the manual about this, but the lid of his hat needs to be perfectly flush, otherwise it will ski jump and launch balls up and over him. Once I adjusted this, it hasn't happened again.
I have a few tweaks left to do to my game, but it's playing 100% and looking great!
Green neon over here and a yellow menagerie ball