| Year | 1998 |
| Date | 22-May |
| Volume | 180 |
| Issue | 4,068 |
| Page | 622 |
| Category | Workshop |
| Part | 2 |
| Title | David & Goliath (Boring heads) |
| Author | Dr. John Beddard |
| Notes | Describes the larger of two piston slide type boring heads. Slide, feed screw, feed screw knob, stepped washer, boring bars, end cap, locking rods, assembly and final details, application, supplier, acknowledgements |