PhD Students Nick Bianco and Chris Dembia give us the low down on OpenSim Moco! Moco solves optimal control problems with musculoskeletal models defined in OpenSim, using direct collocation. We learn how it works and new problems we can now solve with it. They also share their experience developing a software toolkit, including insights into what it is like to work on it as a team and how it has fit in the scope of their PhD.