I plan on buying a rack from retilesupply and I am stuck between 2 thermostat options. Everyone seems to use Helix but the guy from Boaphile recommended I use Ranco instead. Reason being is because he said when the Helix's fail, they fail turned on. While the Ranco's fail while theyre off. Making it safer to use. I would like some input form people who may have used both or people who care defend one of these thermostats. My snakes safety comes first.