First post for me but I had to comment as I had used a variety of temperature controls including none, wet towels, an esky with ice water, cooling coil and pumped ice water and now settled on an effortless method... an old fridge with a cheap and simple temperature controller. No cost for the pensioned off fridge but I did splurge on two Tilt Hydrometers that give me temperature and gravity. I was surprised to find that despite the controlled temperature, some brews run warmer than others when side by side depending on the stage of ferment. An old iphone beside the fridge gives me an update when ever I look giving me confidence on final gravity. Also surprised to see the internal temperature of the wort was higher than the fridge until FG is reached. When brewing side by side I do ensure the beer style is similar (ale and ale or pilsner and pilsner).