| Year | 1999 |
| Date | 13-Aug |
| Volume | 183 |
| Issue | 4,100 |
| Page | 220 |
| Category | Stationary Engine |
| Part | 4 |
| Title | Harlequin & Hybriquin |
| Author | Mike Thurgood (South Africa) |
| Notes | Construction continues. Valve chest cover, ports and studs, boring the cylinder, slide valve |