RRE after the application of the trained NNs on the 540 000 and 900 000 starsim models in percentage for ε Eri (top) and AU Mic (bottom), respectively. We mark the different activity-index combinations used for the NN training. The average RV reduction for the different time samplings average is given for ε Eri in red and for AU Mic in blue. The yellow and green bars indicate the value, if the relative additional error from Table 2 was added to the input data.