[Froggo]

Gelbster, If you have removed your ims bearing at 90 K , found it a little worn ( to be expected ) but still ok , and no ferrous metal in the filter or sump , then the engine with regard to the IMSB is running just fine . So then for peace of mind , why not just treat the bearing as a replaceable maintenance item and install a new bearing of the same type ,[ without seals ] after all the original has done 90k without failure. The original bearing is a $10 bearing , the "Solution " is in excess of $2000 .The critical point to note is that it should be replaced as early as possible in the life cycle of the engine . It seems to me to be a situation of a very expensive sledge hammer to crack a very small nut.
JFP, When you talk of IMS run out I guess you are meaning that the shaft ( tube ) is either bent or not round or both to a max of .010"?