Unless I'm missing something...A/B cast rotates for 45 minutes throughout the night. How would adding a C cast prevent either A or B cast from a 12-13 hour shift? (Unless we're saying C cast goes past 45 minute sets, which is unlikely?)
I'm trying to make this work, but can't without exceeding 12 hour shifts or 45 minute sets. C cast would prevent a weekly fatigue/overtime costs though.