Mass vs semi-major axis (like Fig. 2) for the variant populations DIPSY-1 to 6 as indicated in the panel titles. The baseline population DIPSY-0 is shown in grey in the background. Please note that the top left panel shows the result of an experimental calculation in which some systems are unphysical because the secondary mass is large compared to the primary mass – a situation not correctly captured by our model. Apart from this aspect, the variant populations are remarkably similar to the baseline one, indicating that internal processes dominate the outcome.