| Year | 2021 |
| Date | 26-Feb |
| Volume | 226 |
| Issue | 4,659 |
| Page | 315 |
| Category | Workshop |
| Part | 2 |
| Title | A Convenient Laser Centre Finder |
| Author | Jacques Maurel |
| Notes | Demonstrates a simply made but very effective laser centre finder. Making, balancing, a last improvement |