I have the 7-70 original Seidel engine with Microsens glo system from Austria.
This glo system measure every glo plug while running and supplies (or not supplies) current to a cold running plug.
So my system actually is always " on " to some degree...but runs and idles perfectly.
Just curious what fuel / oil / nitro ratio you are running...i'm sure you have it right but just curious.
Eric