Btw, has anyone considering trying making a bracket like the one in the last picture in the couple of posts up, and then use the rubber thingies between the bracket and frame?
The reason I'm thinking of that is that the rubber will be farther away from the heat. If they still break within less than a hundred miles, I don't think it can be the heat killing them. A thin piece of aluminium bent to shape ought to suffice.
I was worried about this when I did my fix but, in all fairness, the unit never even got warm. It is right out front and catches all the air and I could not even detect that it was 'warm'.
It may be vibration or electrical but, at this point, quien sabe? Just not enough facts to go on. Some die, some don't.