What hub are you running? FH-HF08? Many of the 10s freehub bodies should be interchangeable, but I see the problem with the 11s freehub body. I've actually been looking for old style Shimano freehub compatibility, and have been dismayed that so many of the new hubs are dropping the old style freehubs, and Shimano seems to be quickly dropping the 10s product lines, at least with their high-end offerings.
I have an XTR-M9000 on order, but it is backordered until January, I think. When it comes in I can take any measurements you need.