Hi Daniel,

1) Yeah, I keep forgetting to add tshift to example 9. That example
was based on an analysis in a case where the slice timing did not
exist. I just never remembered to add it...

2) It is up to you what to do with the low frequency vs polort. They
are not quite the same, so I left both in. It probably does not matter
much either way. Maybe I will revisit that and see how to pinch a few
regressors (and save degrees of freedom).

I am surprised that you see a constant term in the matrix. Do you?
The 1dBport command should have a '-nozero' option in it.

You should not set polort via -regress_opts_3dD, since afni_proc.py
controls that. Use -regress_polort for that, instead.

- rick