v_∞ vs. MLR (top panel) and V − K_S vs. MLR (bottom panel). O-rich Miras with Tc observations are shown with the same symbols as in Fig. 3. Open green symbols represent Miras without Tc observations. Black symbols represent the based stationary wind models: C/O = 0.54: circles; C/O = 0.74: squares; C/O = 0.95: asterisks. Dashed lines connect models with the same MLR. Both diagrams were used to fine-tune the models to the observed sample stars.