Subscribed. Excellent info, AssistantBrewer, thanks for posting.
I often wondered why people didn't just tweak the basic mechanical thermostat. I figured it would take some bending or a shim or some tweaking of something, I had no idea that a built in set screw would do it. Nice.
In a similar vein, for newer models with a thermistor or other sensor, it should be pretty easy to tweak with a series or parallel resistor/pot to shift the operating point.
Can anyone point to a cheap, generic thermostat like this that would be easy to adapt for fermentation chambers or other such apps? Should be cheap on-line for a common part, I would think?