Hi Edward, thanks for the kind words, I have to say I probably won't do it againEdward wrote:One question; in the picture of inside your fridge unit with the caption, "All tucked up: Now you may look at that and think "he only got 19 litres" but the rest is foam from the paddle aeration, told you it was good." - what is the tube at the bottom? I'm assuming heat control? If so can you give make/model number?
Thank you.

That is a tube heater, click this link it provides the heat side for maintaining the constant temperature for fermentation, the fridge of course providing the cooling. Just above the fridge there is a picture that shows an STC 1000, which is a temperature controller, a sensor from this is fed through the door seal and is taped to the side of the FV and isolated with some bubble wrap to monitor as close to the beer temperature as possible. I have tested this many times and it is nearly always within 1/2 a degree of actual. After good sanitation I think temperature controlled fermentation is one of the most important things a brewer can control. In a fridge that size the 60W version is adequate but if you have a larder fridge you might go a little higher and use a small computer fan to circulate the air.