| Year | 1997 |
| Date | 28-Mar |
| Volume | 178 |
| Issue | 4,038 |
| Page | 390 |
| Category | Workshop |
| Part | |
| Title | A Simple Screw Gauge |
| Author | Ivan Sparks (New Zealand) |
| Notes | Made a very basic 'mike'. Remember that we rarely measure; mostly we compare. Tools required, materials, method, checks for accuracy |