I have recently made a wither skeleton farm using iron spikes and the fact that there 3 blocks tall. It follows a design using a tier 5 soul cage and a 2 block opening where they see you and chase after you, but hit spikes on the 3rd block up, when they die, hoppers below those spikes collect items and move them all to one hopper on the left that im trying to get to use a buildcraft diamond pipe to sort out stuff like the broken stone swords, but I cannot get the hoppers to put the items into the pipe to be sorted, can anyone help me with a solution? will post screen shots if needed thanks.