Gray Beard, what makes the glow plug connector in the first picture a "permanent" installation.  With a regular glow plug ignitor, it seems like it doesn't want to come off when I want it to and when I want it to stay on, it wants to fall off.....  How would that plug stay on inside a cowl or somewhere you couldn't get to it?  Surely, with my luck, that thing would pop right off.  I like your system, though, very clean!