Hi Edward. Would it be useful to add additional features on top of the relax_disp.insignificant function? A possibility to only select spins, which have a S/N above 10 or more? This could be run before analysis, and only depends on spectrum.error_analysis(). The relax_disp.insignificant function is not enough. If a "weak" peak is loaded, with intensity near the noise, then calculation of R2eff can fluctuate quite a bit. This will not be observable with relax_disp.insignificant. The SN ratio could even be calculated and stored when doing the spectrum.error_analysis(). Best Troels