polort and filtering

Hi Rick,

I assume it would be redundant then to use both -polort and -bandpass together, right?
Paul wrote a very helpful explanation of the dangers of bandpass filtering, I wonder if polort suffers from the same problems, namely reduced D.O.F., when using 3dTproject?

Also, if my confounds file (-ort) include compcor and related cosine regressors from fmriprep, should I turn off both -bandpass and -polort? Or is using -polort always recommended?

Thanks!