Amplify Shader ZTest

Hi, I've just downloaded the Amplify Shader for Unity and am loving it its so easy to use!
I'm creating a skiing game, where I have a slope with one material on a mesh, I've placing another mesh with a track on it over the top.This sits flush with the slope mesh, and has no collider. Because its so close to the below mesh I get flickering from the ZTest. Is there a way of creating a shader that will use the ZTest less than... but shift the test value by a small amount, so the track will always be on top? I've tried using the Offset Factor and Units but this seems to move the rendered material up. I want it to stay in the same place, but just always win the ZTest fight with the below mesh.
Thanks!
I'm creating a skiing game, where I have a slope with one material on a mesh, I've placing another mesh with a track on it over the top.This sits flush with the slope mesh, and has no collider. Because its so close to the below mesh I get flickering from the ZTest. Is there a way of creating a shader that will use the ZTest less than... but shift the test value by a small amount, so the track will always be on top? I've tried using the Offset Factor and Units but this seems to move the rendered material up. I want it to stay in the same place, but just always win the ZTest fight with the below mesh.
Thanks!