Here's my quick setup trying to recreate that Milk-Drain-A-Ton:
 
Deployer is facing up towards the cow. Inside are empty buckets (
my test uses a single stack of 16). Every redstone pulse makes the deployer fill one bucket with milk. I used two retrievers - first one is connected with pneumatic tubes to the deployer and is set to "draw milk buckets", sending them towards a Liquid Transposer set do "drain liquids". Make sure you place a rp2 cover between the input and output tubes. In this test, its a not very good to see sandstone cover. 

 Output connects (
via pneumatic tubes) to the second retriever, set to "drain empty buckets and paint them white" (
just to make absolutely sure the buckets don't get send to the first retriever in error) sending the (
now) empty buckets back to the deployer. The deployer and the two retrievers are powered by a timer set to 1 second. The Liquid Transposer just needs power (
any kind of BC energy) and no redstone pulses. The tanks in the bottom half are 3 high and its a five-by-five square of tank pillars. While I wrote this, the Cow-Milkinator filled 3 and a half of these tanks with some milk distributed among the rest of the tanks. I'm loving this. 
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For the sake of the "What is this, I don't even... but I want one!" I powered all of this using a quick setup of a redstone-energy-cell and a batbox with a few solars.