I am creating this simulation for a school project and have attached the FlexSim file. How can I make the separator pull from Yard_Bottles only when there is a supply of caps in the cap storage queue? Otherwise it should pull from the Yard_Caps. In other words, my aim is for the separator to pull primarily from Yard_Bottles, but ensure there is a constant supply of caps in the "Cap storage" queue by pulling from Yard_Caps when this queue is near empty. This will be simulating the need for bottle and cap storage on a bottle filling line. Please let me know if you have any questions, I really appreciate your help!