Sounds like your main (big) blade grip bearings are not "seated" all the way into the recess..
I was tooling with this yesterday on my SA. Make sure you have the big bearings pressed into the blade grip all the way before installing the smaller 3rd bearing. Be carefull not to destroy the bearings. I got finicky with one yesterday and blew the balls out of it
anyone ever notice how tiny the balls in these bearings are?
I wonder exactly how many tiny ball bearings it takes to make my heli fly like it does..