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for the three combinations B/C + Be/B, B/C + Al/Mg, and B/C + Cl/Ar. The trend is similar to that for isotopic ratios: L increases with increasing δ . The main difference is that the increase is sharper for both models II and III. For the former, only a small region around δ ≈ 0 . 2 corresponds to small halo sizes. For the latter, the halo size increases sharply above δ ≳ 0 . 6. 

For completeness, similar fits were carried out for the modified DM ( r$_{h}$ ̸ = 0). However, adding an additional de- gree of freedom only worsens the situation, and the models converge to arbitrarily small or high values of L and r$_{h}$ . Finally, if we fit the combined B/C data, the three isotopic ratios and the three elemental ratios, we do not obtain more constraints than when fitting B/C and the three isotopic ra- tios. This may indicate that the models have difficulties in 

