So I'm getting set to create a couple multiblock farms, and I'd like to be able to mass produce the blocks with AE.  Most of the recipes are straightforward, but the electron tubes are looking a bit tricky.  Specifically, I have no idea how you're supposed to automate the Thermionic Fabricator.  From my initial experiments, it looks like I can use routers to insert material into specific slots, but trying to insert materials based on a side just throws them into slot 0, where the glass is supposed to go.  While I can technically use an array of 9 routers to insert the correct number of materials into each slot, keep the glass stocked, and remove the outputs, this seems a little awkward.  I'm fine with dedicating a fabricator to a single kind of tube, though, since I'll probably just need tin and bronze tubes in any real quantity.