If you take a good look at the Schumaker straps which is what I have because it was in stock and their poly lock mounts were on terminal back order , you will see they use a rubber isolater above and below the K member mounted end which you preload this cinch's the motor down real good and snug while preventing the vibration transfer mentioned by others , if you provide slack the biscuit is already pulling itself apart by the time the "strap" takes hold , granted the isolater does compress under load a little but it does so with resistance not free movement , rob a couple of rubber rings and washers from the trucks of your kids skateboard for the bottom of the J hook and you can do the same thing .