While I'm not completely OCD, i do like to simplify my organization and having to move resources around after collecting them across several medium silos can be a tad frustrating, if not tedious.
Solution:
a resource plug on the top of the medium silo which designates which resource is collected there. The first one would be placed there manually by the player, but after that, only that type will be collected on that silo. if the top plug is empty than anything will go there, but that top plug will only be a designation plug not a collector.
Keeps things much more organized without having to collect resources you don't want/need then having to siphon them off.