When using ore sorting plants for multiple resources, one tend to fill the unsorted input buffer up to 280/360, limiting the other resources' trucks jobs scheduling. This can severely limit the effective throughput of the plant.
For example, when using a single sorting plant for coal and sand, sand can fill trucks for other resources (for example coal). Since trucks will never schedule unloading in the plant unless there is enough space in the input buffer, only 1 coal truck can be scheduled at a time until sand is removed or that coal truck is unload and sorted.
This could be mitigated by allowing to customize the max unsorted input space of resources, either for each resources, or globally. This way, we could limit it to for example 240 to allow at least 2 trucks to schedule unloading even if a resource is stuck, or 180 for 3.
