stable (pre shift requests)

run.py

@@ -23,7 +23,7 @@ sites = ("truro", "exeter", "torquay", "barnstaple", "plymouth")
 
 Rota = RotaBuilder(datetime.date(2020, 9, 7),
                    weeks_to_rota=weeks_to_rota,
-                   balance_offset_modifier=4,
+                   balance_offset_modifier=1,
                    max_weekend_frequency=2,
                    max_night_frequency=2)
 
@@ -259,9 +259,14 @@ rota_collections['nights + proc twighlights + normal weekends'].add_shifts(
 
 rota_collections['nights + proc twighlights + proc weekends'].add_shifts(
     SingleShift((sites),
-                "proc_twilight_and_weekends",
+                "proc_twilight",
                 12.5,
-                days,
+                days[:5],
+                workers_required=3),
+    SingleShift((sites),
+                "proc_weekends",
+                12.5,
+                days[5:],
                 workers_required=3),
     #SingleShift((sites), "night", 12.5, days, balance_weighting=1, workers_required=3, rota_on_nwds=True),
     SingleShift((sites),