I found a great ramp surface. Those cheap .15 to .20 each 4" white bathroom tile. The top is shiny and slippery but turn them over and they are a perfect nails shaping non slip surface and they are not too heavy so a Coroplast ramp works just fine under the tile. I just used double stick carpet tape to attach them. This way the back nails which grow faster get a good polish every time they go up or down.
Linda
Linda