[Ifeffit] LCF with different scales

Hi list, I'm looking for a way to make LCF with standards that were measured at different occasions and beam-lines. I did read previous comments regarding this issue, but still need to clarify: 1. Does limiting the range to the smallest range help in this case (if spectra were measured with the same steps size, and a calibration standard was used)? 2. For harder situation; when different steps were used - I found that sixpack (according to its manual) interpolating all spectra to the same energy grid - does this solve the problem? I will be happy to be advised. Thanks, Hana