z_REMOVE_PIECES_BY_VOLUME
- for each connected element , remove if doesnt match min or max measured volume , also has options of perimeter or other measurements

z_KEEP_ONLY_LARGEST_CONNECTED_ELEMENT
removes smaller detached objects
z_KEEP_BIGGER_OF_TWO
- takes two inputs and ouputs only one ( bigger or smaller )

z_KEEP_ONLY_FIRST_LAST_PRIMS
- carve for prim lines after segments split

z_REMOVE_THIN_MESH
- removes prims based on thickness measurement , then can fill in holes , useful for removing thin slivers
