I just don't see the point in buying one if you need to buy a different thermostat. Without the stock thermostat it is just a styrofoam box with a dinky heat element. 1 or 2 clutches this year quickly becomes 4-5 clutches next year. Last year I had one clutch, but I made a bator out of a free full sized fridge for the cost of a thermostat(I used an old electric blanket for the heat source and didn't need a fan since I only had one bin in there). It may have been more than I needed at the time, but I'm glad I have it this year for my multiple clutches.