I'm planning a track expansion and want to try the ladder system. Mine will be mostly on the ground. I plan on putting the ladder system so the top is just above ground level. The track will sit on this. The question I have is do I put something on top of the ladder system so ballast doesn't fall through and sink into the ground? Also I was thinking if I had something between the ladder system and the track it would require less ballast. I like to use chicken grit for ballast and at $10 for a 50# bag it can add up.