I had 2 machines at the so this year. My Gladiators and RFM. Glad had a sling issue that could not be fixed before the show but I brought it anyway. Did not effect the play to much.
Low and behold it was used in the tournament along with RFM. It was the guy that tried to level the my RFM and almost tip it over that I have an issue with.
Call the person if there are issues instead of complaining or trying to fix something on someone else's machines.
I had $25K+ in machines at the Cleveland show and still people had issues with how they played. Go figure.