| Year | 1989 |
| Date | 01-Sep |
| Volume | 163 |
| Issue | 3,856 |
| Page | 304 |
| Category | Workshop |
| Part | 3 |
| Title | Hardness Tester |
| Author | Dave Lammas |
| Notes | Describes the function and building of an instrument for the home workshop. The lever frame casting, the upper lever pivot bracket, main lever, pivot pins |