So wher are you at now? Curious minds must know !! 

I had some spacers turned .1mm in between, outside diameter 14.8mm, inside diameter 8.5mm.
In this way I can adjust the spacing between the Silent Hektik rotor and the hall sensor if necessary.
As long as the brushes are in full contact with the alternator collector, I think there should be no problems.
Will make a picture when mounted!