I have put on 3 of my wheel assembly Type Y and after spinning them 1 spins true the other 2 wobble whilst spinning. This view is with the hull upside down and looking from above. I put a forth one on and it too has a wobble

I think this means my bearings are not centered so I have taken one of the hubs off and knocked out the bearing. Before I put in new bearings and locktite what tips / tricks are there to ensure the bearings are centered true?
I may be on the wrong path if so any advice to get them spinning true would be greatly appreciated.
Thanks
Tim