I didn't notice this for a while but it looks like the guys who vapour blasted my cases, saw that there was a bearing still in there and attempted to get it out.
Well they botched that pretty bad. Gouging out the inner part of the bearing and leaving the outer shell in place after marking up the cases pretty badly.
With the help of some technically adept motorbike mates, we got the shell out and smoothed off the damage.
This is how it looked when it was sent for blasting (OK I should have got it out myself):
so we took the Dremel to it:
and out it came:
New bearing had a lot more rollers on it and will go back in after the painting has been done.