Autofilter (port controller)

The game has a problem with filter or belt clogging. This happens when one type of product blocks another from passing along the belt due to a buffer overflow. The most obvious solution here is to use three belts for three factory ports. But what if we want to use a single Level 2 or Level 3 belt to handle all the products at once? If everything goes along a single belt, clogs are inevitable. This problem can be solved by combining two filter->balancer pairs plus one balancer. But this solution is very cumbersome and expensive. A port controller would do the trick here. It connects directly to the factory and diverts goods that are blocking the flow of other goods. For example, nuts, bolts, and washers are transported to the factory on a single belt. If the factory buffer suddenly becomes overflowing with bolts, the factory "notifies" the controller, which diverts the bolts, which will then continue along the belt to a warehouse or another factory that may have a shortage.