1. Air shut offs: Unlike gasoline engines where you can just kill the spark and the engine will stop running a diesel will keep going as long as it is getting fuel. Any fuel. That includes engine oil or anything that will combust. So as a safety net would you buy a product that would allow you to cut the air flow to the engine? Anyone out there make their own kit?
2. Ether start systems: Many of the biggest diesel manufactures offer or have offered an ether start system. Basically electronic solenoids deliver ether into the air intake. It does this once the engine has started cranking and a little more to get it going.