It's almost exactly the "Metzen setup", 15L of solution sitting inside a plastic container with about a third to a half of a bent freezer compartment submerged to do direct cooling.
The only issue I've hit so far is that the temperature probe for the fridge controller is reporting big jumps in temperature quite randomly, it can jump up or down 2 or 3 degrees sometimes. I simply popped the probe into the glycol solution when setting things up, I wonder if it's wandering...
Hi all, thanks so much for the info in the thread, I've copied the design and am in the middle of my first fermentation, all is going pretty well so far, 15 litres of solution (5L of glycol and 10L of water) for 22L of wort.
See a pic of my setup: