Ok, thank you. It also makes sense to have simillar pieces to flow control mod, because yes, you could wire up all the valves from flow control with pumps and circuit control, but it is cleaner and faster with dedicated pieces. It also makes for cleaner layouts, and that makes it easier for the player to make sense of what's the purpose of the layout (a huge problem with all circuit network builds - identification)
Sorry if I wasn't clear, I meant about adding a liquid storage tank that connects to a large duct directly, and not just connecting 2 vanilla tanks through an interface piece. Not sure if Krastorio has such a tank, but if it does please push it to this mod.