I bought an inner tube from Tractor Supply (doesnt matter what it fits) and cut it up into strips which I glued with contact cement to the skid plate. I only put the strips where the skid contacts the frame and I left a few open areas so that water can drain out easily. This helped the vibration some. My worst vibrations are coming through the PRM side bars, I drilled some small holes at each end and filled with silicone. This made it more livable.