Left panels: clumpy torus model fit of Circinus, NGC 424 and ESO 103-G035 NuSTAR observations, respectively. In each case a reasonable fit (black line) is obtained with our unified clumpy torus model including an inner ring (see Sect. 3.3). We added a Thomson scattered component (see Sect. 4 for details), which contributes substantially in Circinus. Right panels: constraints on the geometry parameters of the inner ring (CTK covering factor, y-axis) and the cloud population (σ, x-axis), within the allowed ranges of our model. High Compton-thick covering factors are preferred for all three sources.