Optional- Cover Lifter Plate Package. In some cases you may need this option to work with your existing Hot Spring/Hot Spot/Tiger River/Caldera Cover Lifter. This option is necessary when the cover lifter requires attachment into the hot tub cover. This will work with the Hot Spring CoverCradle, CoverCradle II, Lift-N-Glide and Uprite cover lifters. This requires piercing of the vinyl skin of the cover into metal plates on the inside of the cover. With this option, we will add aluminum or metal plates inside the cover. These will not be visible to the naked eye but can be located by tapping on the outside of the cover. Not all Hot Spring/Hot Spot/Tiger River/Caldera Cover Lifters require this option. Some newer models are the “fold over” type and require no additional mounting hardware. If you have any questions concerning this, please contact us at 1-877-551-5520.