[Ifeffit] SS and MS contributions to EXAFS

Dear users, I would like to quantify the single scattering (SS) and multiple scattering (MS) contributions to the EXAFS spectra over a range of k values. I adopted the following approach and I would like ask experienced users if my approach is sound: (1) Run a regular EXAFS (default NLEG=8); I assume this includes all possible scattering paths. Call the chi(k) data chi.dat (2) Run another EXAFS but this time I set NLEG=2. I assume this is for all SS contributions. Call the chi(k) data chi_ss.dat (3) To obtain the MS contribution, I subtracted chi_ss.dat from chi.dat If my approach is faulty, can you tell me how to remedy it? Thank you.