| Year | 2007 |
| Date | 22-Jun |
| Volume | 198 |
| Issue | 4,302 |
| Page | 761 |
| Category | Pete's Page |
| Part | |
| Title | Modified Callipers |
| Author | Peter Spenlove-Spenlove |
| Notes | Reminisces about government surplus stocks, internal calliper to check small holes. Home again, practice needed |