Cyclone S Diff's

So recently, when my diff needed it, I decided to replace the pulley and balls. except when I went to put the new balls in, they were to small.

So out comes the calipers, and the diff balls measure 2.35mm whereas the pulley hole measures 2.5mm, And I've emailed HB about it with no reply. And that was 2 and a half weeks ago. So, I have decided to try some 2.5 mm balls. and will keep you posted.