I'm working on bee automation in the DW20 modpack (plus Blood Magic, minus Ars Magica and pneumaticcraft), and I'm trying to find a way to automate the production of frames. I have most of the stuff done with cyclic assemblers, but I'm running into an issue with keeping it properly stocked. I get cotton MUCH faster than I get the wood for sticks (I'm using impregnated because I want to, and I want them for the other aspects of bees like chocolate frames and soul frames), so I'm worried about eventually the assembler filling up with string and needing to be cleaned out before being used again. Not to mention the fact that this will give me way more string than I need. So aside from trying to balance the production of wood against the production of cotton, is there a way to make sure I keep only one stack of string in the assembler at a time? My first attempts were with Applied Energistics, so I can use a level emitter to shut off the string assembler when I get a stack of string in the system, but I can't make it stop putting string in the second assembler, and I can't make it put a set amount of two things in it, so I can't have it keep 64 each of string and sticks in there.