  We revisit the recipe for hadron formation in the Lund string hadronization
model. Given an incoming quark or quark-diquark pair, weights for hadron
formation are updated to take hyperfine splitting effects arising from the mass
difference between u, d-type and s-type quarks. We find that the procedure
improves the description of hadron yields in $\mathrm{e}^+\mathrm{e}^-$
collisions and the $\phi$ cross section in neutral current DIS. We also show
results for proton collisions, and discuss the future use of this study in the
context of small system collectivity.
