[phenixbb] How to manually define NCS group for phenix.autobuild?

Hello everyone, It is easy to manually define NCS group in phenix.refine, but how to manually define it in phenix.autobuild? phenix.simple_ncs_from_pdb will generate an .ncs_spec file which can be used in autobuild, but what if I want to define ncs group myself, say removing some residues from the automatically detected one. I can manually remove them from the .ncs_spec file, but the operations defined in the .ncs_spec is no longer valid? Thanks in advance Jason U Pitt