has anyone on here ever rebuilt a K03 turbo themselves? I'm talking about replacing oil seals and bearings. Is it a feasible DIY job or would the shaft assembly need re-balancing afterwards? As I understand it, it depends how the turbo is made, either they individually balance the shaft components (turbine, compressor wheel, shaft itself....) in which case you can take it apart and put it back together without balancing. Or the assembly is balanced as one piece and therefore if you take it apart you'd need to balance it again (due to it being pretty impossible to get everything lined up exactly how it was).