| Year | 1941 |
| Date | 16-Oct |
| Volume | 85 |
| Issue | 2,110 |
| Page | 317 |
| Category | Workshop |
| Part | |
| Title | Modifications to a Ball-turning attachment |
| Author | W.D.Young |
| Notes | Sketch showing details of the attachment, the tool-holder in pieces, the attachment and a 15/16" dia. ball |