Just an interim update here. I added a ground wire to the VR mounting that provided a clear, positive ground back to the battery ground and to the engine. That might have helped the heat problem somewhat but it was so slight it could have easily been my wishful thinking.
I added a blast tube like DHeal suggested. It was almost embarrassingly easy to put one in. I got some 7/8" ID plastic tubing from Lowe's. It was on a roll so when they cut off my 2' the tube had an inbuilt curve that was perfect to get from the side vent to the front of the VR. Anyway, a couple of clamps to the avionics tray base and I had a blast tube. I flew it today and I think this was the first time I've ever been able to comfortably hold my hand on the VR. It provides a small amount of airflow from the prop while on the ground but a real good airflow in the air. Surprisingly, it didn't seem to cut down the airflow into the cockpit from the right side - important here in Florida.
Now that I can keep it cool, I'll be interested in seeing if it lasts longer.
