All changes to tower
| Date | Change | Source |
|---|---|---|
| 17 May 2010 | 1-8: nom'l, turning added; 1: wt amended; 3,4,5,8: diam amended; | Andrew Higson via 00008640 |
| 3,4: canon info amended; frame maker, date added, layout amended | Andrew Higson via 00008640 | |
| 30 Oct 2009 | 1-8: frame id added; frame info added | John Baldwin via database |