Same as Fig. 1, but with all LIM P(k) results shown with 1σ uncertainties per k-bin and on a linear scale. Furthermore, instead of the specific models shown in Fig. 1, we show the typical range of allowable power spectrum values based on the two-parameter analyses of Sect. 3, with the b-/v_eff-informed variations showing attenuation for line broadening left uncorrected. These allowable ranges shown should not be taken to represent a detection as they assume non-negative P(k) values by definition.