Me and my friend, at our base, have 2 nuclear reactors. We have a world anchor so everything runs when we are offline - alas, this means the nuclear reactors need to be refilled, so I came up with a system - before we leave, we put some refined uranium and cells in a chest - this pumps them into a automatic crafting table, making uranium cells. But the problem is giving the same amount of cells to each reactor - at the moment we just have 2 pipes coming out of the main pipe, which the items are coming from. My only idea is a iron pipe switching, from a redstone clock, but they are getting pumped out to fast. Any ideas?