| Year | 1993 |
| Date | 15-Oct |
| Volume | 171 |
| Issue | 3,955 |
| Page | 473 |
| Category | Workshop |
| Part | |
| Title | Square Checking Tool |
| Author | Bob Paule |
| Notes | Beam, base, discs lower & upper, sleeves, locking knob, clamp screws, assembly, using the square checker, picture on page 459 |