I think it's helpful to have ideas for how to make cheaper thermostats without safety features safer since some people aren't in a position where they can immediately buy an expensive Herpstat or VE. I've also heard of people hooking up two thermostats to each other so that if one fails ON the other one will still cut off power.
However I agree that a better thermostat that has alarms and safety against failing ON is the best investment in the long term. I would recommend to anyone to buy a good Herpstat or VE with safety relays as soon as possible. They last decades and will never let you down.
It only takes one thermostat failure to lose or seriously injure your snake and it's just not worth it to put your pet or yourself through that kind of suffering. Plus the vet and medication bills from one burn could probably pay for several good thermostats!
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