Today I removed my injector kill switch and installed one of
Natalya's ingenious force auto-stop PCBs.
It seems a lot touchier than simply cutting fuel to the engine as it relies on the computer to decide if auto-stop is appropriate, and I'll have to install a 27k ohm resistor to fool the temperature sensor as the weather cools off, but I greatly appreciate that I don't get oil pressure and 12v battery lights upon killing the engine.
My biggest hope for this system is that, upon restarting the engine, it won't run in open-loop for ~10 seconds and preventing lean burn immediately after EOC as it does with the injector kill switch.