I have a supreme slider, a silicone oven mat and a flying carpet sled from Amazon. None of them made
me a better FM quilter. I gave up on all of them. For me it works better to have the quilt supported. I have a table on the left and an ironing board level with my table behind. My sewing machine sits flush in an arrow table. I turned the arrow table around to have a bigger space in front. For me- this works best.