I have a basic setup where items placed in a chest are extracted by a wooden transport pipe into a pulverizer, and in turn to an induction furnace and finally an output chest. Since the wooden pipe constantly extracts items, if the pulverizer is either full or contains a different type if item, the extracted item will be ejected out of the system. Is there a way to prevent items from being extracted until there is a vacant slot in the pulverizer, or is there some mechanism that will queue item processing? As an alternative solution I simply placed another section of pipe that loops back into the starting chest, but the items never actually go back into the chest, they just bounce back and forth as if they can't turn the corner. I think also some items would occasionally pop out the end of the pipe adjacent to the engine.