[phenixbb] phenix elbow: is similar compound helpful to create restraint for new ligand?

Hello Phenix users, I have tetrabutylphosphonium in my crystal. I found a similar compound tetrabutylammonium (PDB residue name TBA) which are found in several PDB entries. Usually I draw the new compound in 2-D format and convert to 3D and then create restrain files. In this case, considering N and P are very similar, will the TBS be helpful for elbow to generate restrains for tetrabutylphosphonium? Thanks Rongjin Guan