Testing the portability of the 2010-trained sub-masks to the 2007 data set of EV Lac, for the simulated grid of (n_sample, n_stop) combinations. Almost all the sub-masks yield the same RV RMS improvement for both 2007 and 2010 (i.e. the improvement ratio is close to 1), demonstrating the portability of the randomised approach output beyond the training year. In a few cases the improvement ratio is either greater or lower than one, meaning that the benefit of the sub-mask is greater for 2007 or 2010, respectively. The panels from left to right illustrate the 10th, 5th, and 1st percentile case.