[phenixbb] heavy atom sites in autobuild

i'm confused about treatment of heavy atom sites in autobuild. couple questions : 1. since heavy atom sites can be treated as single atoms, should phenix.autobuild simply refine the positions within a protein model? i.e. heavy atom sites should not need to be treated as ligands, with a .cif -- right? 2. if i want autobuild to build around the heavy atom site, can i just use input_pdb_file=heavy.pdb? input_lig_file_list= is not working. -bryan