Reply To: Table border: only outside rules (no interior rules)?

You have earned your ID Master badge for the day! This works perfectly. Do you want to go double or nothing with table issues? Another ongoing issue I have with tables in in the column heads. For a multiple column head with a column rule between each column, how do I automatically turn off the outside columns so the disappear? The left side drops off but the right side always picks up the style of the middle divider, thus I need to manually turn this border off.
Here’s a sample of what my problem is (tweaked for easy reading):
https://www.dropbox.com/s/xzienor4bs9h2aq/Table2.indd?dl=1