Hiya,

The best thing to do is strip it all down and clean it up, once you've collected all your balls, count them and measure their size, once you know this you can look at replacement balls for/if any are missing.

I can't remember for sure what screws are used on these machines but I'd bet they are just 1605 ballscrews, again you can measure the screw diameter to confirm this and once we know all this week can advise on what's what.