I think that the Plastic Ball that AE makes is about .5mm to small in Dia. so this is where some of the Slop is coming from... I was able to reduce some of it by applying a small about of thread lock around the plastic balls..... some what of a temp fix but you will need to re-apply it after a day at the track.. but you will notice some of the play go away
...something else to try out
-Dave