Michden:

It's finished. Fly it.

Cap strips are an easy way to mask an unevenly sanded rib, and sometimes they are used for appearance.

They do add lateral rigidity to the ribs, but since there are no lateral loads on most ribs they aren't needed for that either.

The added surface for covering adhesion is there, but again, usually not needed.

If you are building your own design, use them or not as you please, but otherwise just go with what the designer drew on the plan.

Cap strips look great,
. Otherwise, just more weight.

Bill.