All of the original Rascal 110's around here had cracked and broken windshields from the screws that hold it on and the vibration from a gasser. I've tried cutting small pieces of fuel tubing to put under the screw heads but it always come out. Anyone have any new idea's that they have done on other planes?

Very small O-ings, or I have found small rubber backed washers at Ace Hardware, but they were approx 1/4" dia.