Is there a way to quickly find all the references to an object in the model?
In Witness I can right click on anything (machine, conveyor, variable etc..) and select "Used" it will pull up a window showing every time that object is referenced in the model (input/output rules, the equivalent of triggers, etc..)
This is incredibly useful for debugging complex models, especially if someone else built the model or if you haven't worked on it for a while.