Ooops, I think I found the problem
I was stepping through the output to help debug when I found the problem.
Typo , sorry guys I was putting the wrong number for the third column
I have checked it on the scanner and all bvalues are now correct (within numerical error anyway)
While I have your attention.
Theoretically we need 45 directions for CSD, but for single shell we do 60 for SNR reasons.
With multishell, can we now get just as good a result with the 45 direction at b=3000?
Thanks again, sorry about my incompetence.
Richard