I used the same paper template trick: I measured the diameter of the exhaust side of the CHRA and drew a circle in CAD, then divided it into equal parts (11 in my case since my turbo has 11 vanes) and printed it at 1:1 scale. The turbo can be clocked to any of the 11 positions that doesn't have a little support roller. To mark the correct position I made a tiny notch with a file on the outside surface of the exhaust housing, and a corresponding notch on the CHRA.