All changes to tower
| Date | Change | Source |
|---|---|---|
| 7 Oct 2010 | 1-5: nominal, turning, frame id added; 1,3: diam amended; | Andrew Higson via 00008859 |
| frame info added | Andrew Higson via e-mail | |
| 20 Jan 2005 | Unusual weight gradation noted | Nick Bowden (CB Lincs & Dove Edn8) via e-mail |