So I've been having a bit of an issue with integrating my industrial blast furnace with my AE network. Placing an export bus on top of a blast furnace block works fine for all the single-ingredient recipes like silicon plates and aluminum, but when I try to make steel or tungstensteel, I need the components to come in from both above and below. Placing an interface or export bus on top of the furnace only supplies items to the top slot. Currently I've worked around this using a diamond pipe and an item tesseract to divert the secondary components to beneath the blast furnace, but it's kind of an ungainly solution. Is there an easier way to synchronize inputs to the top and bottom of a block for a given crafting request?