You can replace the bearings, as a cartridge or as balls... I just didn't need to.Well, that answers my question.
He ''resealed'' it.
I guess, as long as you caught the failure early, this would suffice. Bur for someone who has had a "catastrophic" failure, you're S.O.L.
Furthermore if the turbo has not been balanced after factory then you don't need to balance since the components are balanced individually. If you are still concerned mark the turbine shaft to the compressor wheel with something more permanent than a marker.