I gotta laugh because after I put my field box together, I was at the club field fueling the plane. Attached bananas to the power panel
and tried to start the engine. The OS .46 usually fires right up. It didn't this time. Reason, I left the heat knob on the power panel set at 0. As soon as I turned up the heat to 3.5 -4.0 amps, engine fired.

Dave...