I have updated the documentation in the DCC here,

https://dcc.ligo.org/LIGO-T1500502

about hoft generation for ER8/O1 to include information about C02 hoft.

In particular, these caveats are included:

* For the exact versions of filter files, code, and command lines used to generate C01 and C02 hoft see: https://wiki.ligo.org/Calibration/GDSCalibrationConfigurationsO1

* Users should check with their working group about which vetoes and which veto-definer files to use with each type of data before producing final results.