just about—
1. almost:
- He knows just about everything there is to know about shipping cargo out of Miami.
2. (followed by Infinitive) on the point of doing smth.:
- He was just about to fold up the newspaper when he spotted the classifieds.
only just—
1. a short time ago:
- I only just heard about the inappropriate way Ms. Jacobson behaved.
2. barely; almost not:
- The farmhouse can only just be seen from the road when the trees are not in leaf.