I have a problem with my trex 450 dampers sliding past the collar. I replaced the black dampers that came with the kit and i'm using the red dampers (youngblood)and still having issues. The feathering shaft is not bent (just replaced x 2) When one looks at the main rotor head one can see the dampers and it creates a lots of slop? The baled grips move about 4mm (slop). How can I prevent This ?