OptiWindNet v0.2.3 Drop-in replacement for v0.2.2. The APIs deprecated in v0.2.2 remain available (removal planned for v0.3). Balanced subtrees: balanced=True is now enforced as an exact bound on both the MILP models and HGS, so subtree loads differ by at most one unit. Exact feeder count: pin the number of feeders with feeder_limit="exactly" (MILP) or feeder_exact=True (HGS), instead of only bounding it from above. Reversible lat/lon: L_from_yaml() and L_from_pbf() project into the dominant UTM zone and store it, so coordinates can be mapped back to lat/lon. Concurrent HiGHS: the pyomo HiGHS solver now runs a concurrent tree search (requires highspy >= 1.15). EWRouter exposes the constructor's method and bias_margin parameters. New locations: Revolution, Sunrise, Hornsea 2, Norfolk Vanguard West, East Anglia 3, Hollandse Kust Noord. Fixes: multi-root warmstart eligibility, PathFinder dead-end chains, scaffolded() primed-edge conversion, and sexagesimal coordinate parsing.