add test to skip columns that are within threshold of existing columns.  still need to activiate with parameter
add test to skip columns that are within threshold of existing columns.  still need to activiate with parameter

glennhickey/hal,glennhickey/hal,glennhickey/hal,glennhickey/hal,glennhickey/hal,glennhickey/hal,glennhickey/hal,glennhickey/hal