| Year | 2004 |
| Date | 24-Dec |
| Volume | 193 |
| Issue | 4,237 |
| Page | 749 |
| Category | General |
| Part | 71 |
| Title | Letters to a Grandson |
| Author | M.J.H. Ellis |
| Notes | Provided protection with a traffic cone, investigates the effect of cross-drilling on hole truth, ponders on the vagaries of design for manufacture. Path of least resistance |