Dyanmic Platforms and Erasing Geometry?

I am currently working on a game that involves the dynamic creation of platforms in 3D space for the character to fall on to and interact with. Presently I am able to "draw" platforms using the Extruded Mesh Trail script that comes with the Procedural Examples that are available on the Asset Store.

The issue comes in when I am trying to figure out how to "erase" these platforms. The Extruded Mesh Trail script is good at creating new sections, but doesn't seem capable of removing sections. I've looked in to the Marching Cubes algorithm but haven't found many good examples of implementation that are readily available.

Any insight to this issue is appreciated :D