Just be careful not to overdo any adjustments. You want the sail smooth, but don't introduce any new wrinkles. Usually you work to remove horizontal wrinkles and not add any vertical ones. Overdoing adjustments will put undo strain on your sail.
Besides caps or tubing on the verts, may I suggest one more thing. I added a piece of insignia tape over the holes punched into the sail where the bunji goes. Keeps them from pulling through or elongating the holes.