Originally Posted by Stretch

The "run out" measurements that you made indicated that the hub was running true - well as true as you could expect when making measurements on rough surfaces. That was good.

However, now you've been having a bit of hammer time I think the last bit I've highlighted seems to be the best idea. Rewind and start again.

Do you think that there's a possibility that some how the hub was positioned too far into the trailing arm and so the position of the brake disc is wrong for the position of the caliper? If so this would mean the bearings are shot / wrong...

...in your first post you talk about the bearing seats / bearing cups not being seated properly - could this have been the problem all along?