The cheap-run roll (cheaproll._Charge) shared the peak room by rating, control
shares it by room left to full (packshare.weights). With unequal levels one
battery's drawn block ended too early (rig F-1). The roll now uses
packshare.weights over the simulated levels, each battery capped at its rating,
a full one dropping out. test_ux77 gains two unequal-level walks and a
by-rating mutant; its walks model control's split by room too.
Co-Authored-By: Claude <noreply@anthropic.com>