Top panel: zoom-in of the residual amplitude spectrum after the first nine pulsation mode frequencies have been removed to illustrate the choice of frequencies to include as part of a variant period spacing pattern. The location of two of the nine previously extracted mode frequencies are within this period range and are denoted by dashed vertical green lines. Solid blue lines denote frequencies that have been chosen as part of one of the five variant period spacing patterns. Middle panel: resultant period spacing patterns of our optimised LC_Pápics pattern shown in green and the additional five variant period spacing patterns shown in blue. Bottom panel: residuals of the additional patterns with that of our optimised LC_Pápics benchmark pattern. The period regime of the top panel is denoted as the shaded grey region in the middle and bottom panels.