Originally Posted by luhrks
I use 3-4' of silicon tubing on the return. Just lay it on the grain bed and walk away.
+1 to that. It's what I do as well and it works very effectively. It's what Sabco does in their BrewMagic setups that they've sold for years (and sold thousands). It's also what Blichmann does with their auto-sparge arm.
IMHO sometimes simpler is better.