My model has a conveyor, sorting flowitems to a set of queues. The queues have batches; when a batch is complete the flowitems are moved to a cart by an operator. Currently I am modeling the cart using a queue (with a different 3-d file), but what I'd like to do is to have a 2nd operator come get the cart when it is full and wheel it away. (Mostly for animation purposes, but ultimately for analysis too.) Would I need to use a combiner (and hide it's graphic) and then make the cart a container/flow item? Or is there a simpler way to place one type of flow item into another and then move it?