Good news. On the trip to Gaydon, a cold morning with mist and the heater on, the oil pressure gauge and temp gauge did not mist up. The voltmeter only misted when I put the sidelights on, and only slightly. The fuel gauge still misted but only a thin layer. So a big improvement with a couple more tweaks needed.
How about one of those little computer fans, blowing air over the backs of the gauges, it can even be switchable?
